LTC1538CG-AUX#TR datasheet, PDF

FEATURES

s

LTC1538-AUX/LTC1539

Dual High Efficiency,

Low Noise, Synchronous

Step-Down Switching Regulators

DESCRIPTION

The LTC

®

1538-AUX/LTC1539 are dual, synchronous step-

down switching regulator controllers which drive external

N-channel power MOSFETs in a phase-lockable fixed

frequency architecture. The Adaptive Power

TM

output stage

selectively drives two N-channel MOSFETs at frequencies

up to 400kHz while reducing switching losses to maintain

high efficiencies at low output currents.

An auxiliary 0.5A linear regulator using an external PNP

pass device provides a low noise, low dropout voltage

source. A secondary winding feedback control pin (SFB1)

guarantees regulation regardless of load on the main

output by forcing continuous operation.

A 5V/20mA regulator, internal 1.19V reference and an

uncommitted comparator remain active when both con-

trollers are shut down. A power-on reset timer (POR) is

included which generates a signal delayed by 65536/f

CLK

(typ 300ms) after the controller’s output is within 5% of

the regulated first voltage. Internal resistive dividers pro-

vide pin selectable output voltages with remote sense

capability on one of the two outputs.

The operating current levels are user-programmable via

external current sense resistors. Wide input supply range

allows operation from 3.5V to 30V (36V maximum).

, LTC and LT are registered trademarks of Linear Technology Corporation.

Adaptive Power is a trademark of Linear Technology Corporation.

s

Maintains Constant Frequency at Low Output Currents

Dual N-Channel MOSFET Synchronous Drive

Programmable Fixed Frequency (PLL Lockable)

Wide V

IN

Range: 3.5V to 36V Operation

Ultrahigh Efficiency

Very Low Dropout Operation: 99% Duty Cycle

Low Dropout, 0.5A Linear Regulator for VPP

Generation or Low Noise Audio Supply

Built-In Power-On Reset Timer

Programmable Soft Start

Low-Battery Detector

Remote Output Voltage Sense

Foldback Current Limiting (Optional)

Pin Selectable Output Voltage

5V Standby Regulator Active in Shutdown: I

Q

< 200µA

Output Voltages from 1.19V to 9V

Available in 28- and 36-Lead SSOP Packages

APPLICATIONS

s

Notebook and Palmtop Computers, PDAs

Portable Instruments

Battery-Operated Devices

DC Power Distribution Systems

TYPICAL APPLICATION

D

B1

, CMDSH-3

BOOST 1

M1

L1

10µH

D1

MBR140T3

M3*

C

B1

0.1µF

M2

TGL1

TGS1

SW1

BG1

SENSE 1

R

SENSE1

0.03Ω

V

OUT1

5V

3.5A

1000pF

C

C1

1000pF

C

C1A

220pF

SENSE

–

1

I

TH1

RUN/SS1

R

C1

10k

C

SS1

0.1µF

C

DSC

V

PROG2

C

OSC

56pF

SGND

V

OSENSE2

I

TH2

PGND RUN/SS2

C

SS2

0.1µF

+

5V STANDBY

D

B2

, CMDSH-3

V

PROG1

V

IN

INTV

CC

BOOST 2

TGL2

TGS2

SW2

BG2

LTC1539

SENSE

+

2

SENSE

–

2

1000pF

R

SENSE2

0.03Ω

V

OUT2

3.3V

3.5A

C

C2A

470pF

C

B2

, 0.1µF

M5

M6*

M4

L2

10µH

D2

MBR140T3

+

C

OUT1

220µF

10V

M1, M2, M4, M5: Si4412DY

C

C2

1000pF

R

C2

10k

M3, M6: IRLML2803

*NOT REQUIRED FOR LTC1538-AUX

BOLD LINES INDICATE HIGH CURRENT PATHS

Figure 1. High Efficiency Dual 5V/3V Step-Down Converter

U

4.7µF

16V

+

V

IN

C

IN

5.2V TO 28V

22µF

35V

×

4

+

1538 F01

C

OUT

220µF

10V

1

LTC1538-AUX/LTC1539

ABSOLUTE

MAXIMUM

RATINGS

Input Supply Voltage (V

IN

)....................... 36V to – 0.3V

Topside Driver Voltage (BOOST 1, 2) ...... 42V to – 0.3V

Peak Switch Voltage > 10µs (SW 1, 2) ... V

IN

+ 5V to – 5V

EXTV

CC

Voltage........................................ 10V to – 0.3V

POR1, LBO Voltages ................................ 12V to – 0.3V

AUXFB Voltage ........................................ 20V to – 0.3V

AUXDR Voltage ........................................ 28V to – 0.3V

SENSE

+

1, SENSE

+

2, SENSE

–

1, SENSE

–

2,

V

OSENSE2

Voltages ................... INTV

CC

+ 0.3V to – 0.3V

V

PROG1

, V

PROG2

Voltages .................... INTV

CC

to – 0.3V

PLL LPF, I

TH1

, I

TH2

Voltages ................... 2.7V to – 0.3V

AUXON, PLLIN, SFB1,

RUN/SS1, RUN/SS2, LBI, Voltages ......... 10V to – 0.3V

Peak Output Current < 10µs (TGL1, 2, BG1, 2) ......... 2A

Peak Output Current < 10µs (TGS1, 2) .............. 250mA

INTV

CC

Output Current ........................................ 50mA

Operating Temperature Range

LTC1538-AUXCG/LTC1539CGW............ O°C to 70°C

LTC1538-AUXIG/LTC1539IGW .......... – 40°C to 85°C

Junction Temperature (Note 1) ............................ 125°C

Storage Temperature Range ................ – 65°C to 150°C

Lead Temperature (Soldering, 10 sec)................. 300°C

PACKAGE/ORDER INFORMATION

TOP VIEW

BOOST 1

RUN/SS1

SENSE

+

1

SENSE

–

1

V

PROG1

I

TH1

C

OSC

SGND

SFB1

1

2

3

4

5

6

7

8

9

28 TGL1

27 SW1

26 V

IN

25 BG1

24 INTV

CC

/5V

23 PGND

22 BG2

21 EXTV

CC

20 SW2

19 TGL2

18 BOOST 2

17 AUXON

16 AUXFB

15 AUXDR

ORDER

PART NUMBER

LTC1538CG-AUX

LTC1538IG-AUX

I

TH2

10

V

OSENSE2

11

SENSE

–

2 12

SENSE

+

2 13

RUN/SS2 14

G PACKAGE

28-LEAD PLASTIC SSOP

T

JMAX

= 125°C,

θ

JA

= 95°C/ W

Consult factory for Military grade parts.

2

U

W

W W

U

W

TOP VIEW

RUN/SS1

SENSE

+

1

SENSE

–

1

V

PROG1

I

TH1

POR1

C

OSC

SGND

LBI

1

2

3

4

5

6

7

8

9

36 PLL LPF

35 PLLIN

34 BOOST 1

33 TGL1

32 SW1

31 TGS1

30 V

IN

29 BG1

28 INTV

CC

/5V

27 PGND

26 BG2

25 EXTV

CC

24 TGS2

23 SW2

22 TGL2

21 BOOST 2

20 AUXON

19 AUXFB

ORDER

PART NUMBER

LTC1539CGW

LTC1539IGW

LBO 10

SFB1 11

I

TH2

12

V

PROG2

13

V

OSENSE2

14

SENSE

–

2 15

SENSE

+

2 16

RUN/SS2 17

AUXDR 18

GW PACKAGE

36-LEAD PLASTIC SSOP

T

JMAX

= 125°C,

θ

JA

= 85°C/ W

LTC1538-AUX/LTC1539

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

Main Control Loops

I

IN

V

OSENSE2

Feedback Current

Regulated Output Voltage

V

OUT1,2

1.19V (Adjustable) Selected

3.3V Selected

5V Selected

V

LINEREG1,2

Reference Voltage Line Regulation

V

LOADREG1,2

Output Voltage Load Regulation

V

SFB1

I

SFB1

V

OVL

I

PROG1,2

I

Q

Secondary Feedback Threshold

Secondary Feedback Current

Output Overvoltage Lockout

V

PROG1,2

Input Current

T

A

= 25°C, V

IN

= 15V, V

RUN/SS1,2

= 5V unless otherwise noted.

MIN

TYP

10

q

CONDITIONS

V

PROG1,

V

PROG2

Pins Open (Note 2)

(Note 2)

V

PROG1,

V

PROG2

Pins Open

V

PROG1,

V

PROG2

= 0V

V

PROG1,

V

PROG2

= INTV

CC

V

IN

= 3.6V to 20V (Note 2), V

PROG1,2

Pins Open

I

TH1,2

Sinking 5µA (Note 2)

I

TH1,2

Sourcing 5µA

V

SFB1

Ramping Negative

V

SFB1

= 1.5V

V

PROG1,2

Pin Open, SENSE

–

1 and V

OSENSE2

Pins

0.5V > V

PROG1,2

INTV

CC

– 0.5V < V

PROG1,2

< INTV

CC

EXTV

CC

= 5V (Note 3)

3.6V < V

IN

< 30V, V

AUXON

= 0V

V

RUN/SS1,2

= 0V, 3.6V < V

IN

< 15V

V

RUN/SS1,2

= 0V

V

OSENSE1,2

= 0V, 5V V

PROG1,2

= Pins Open

C

LOAD

= 3000pF

C

LOAD

= 3000pF

C

LOAD

= 500pF

C

LOAD

= 500pF

C

LOAD

= 3000pF

C

LOAD

= 3000pF

6V < V

IN

< 30V, V

EXTVCC

= 4V

INTV

CC

= 20mA, V

EXTVCC

= 4V

INTV

CC

= 20mA, V

EXTVCC

= 5V

INTV

CC

= 20mA, EXTV

CC

Ramping Positive

C

OSC

= 100pF, LTC1539: PLL LPF = 0V (Note 4)

LTC1539, V

PLLLPF

= 2.4V

LTC1539

f

PLLIN

< f

OSC

f

PLLIN

> f

OSC

I

POR1

= 1.6mA, V

OSENSE1

= 1V,

V

PROG1

Pins Open

V

POR1

= 12V, V

OSENSE1

= 1.19V, V

PROG1

Pin Open

V

PROG1

Pin Open % of V

REF

V

OSENSE1

Ramping Negative

V

PROG1

Pin Open

q

MAX

50

1.202

3.380

5.100

0.01

0.8

– 0.8

1.22

–2

1.32

–6

6

UNITS

nA

V

%/V

%

V

µA

V

µA

V

µA

mV

ns

V

%

mV

V

kHz

kΩ

µA

V

µA

%

Cycles

1.178

3.220

4.900

1.16

1.24

1.19

3.30

5.00

0.002

0.5

– 0.5

1.19

–1

1.28

–3

3

320

70

1.3

3

150

50

100

50

Input DC Supply Current

Normal Mode

Shutdown

V

RUN/SS1,2

Run Pin Threshold

I

RUN/SS1,2

Soft Start Current Source

∆V

SENSE(MAX)

Maximum Current Sense Threshold

TGL1, 2 t

r

, t

f

TGL1, TGL2 Transition Time

Rise Time

Fall Time

TGS1, 2 t

r

, t

f

TGS1, TGS2 Transition Time

Rise Time

Fall Time

BG1, BG2 Transition Time

BG1, 2 t

r

, t

f

Rise Time

Fall Time

Internal V

CC

Regulator – 5V Standby

V

INTVCC

Internal V

CC

Voltage

V

LDO

INT

INTV

CC

Load Regulation

V

LDO

EXT

EXTV

CC

Voltage Drop

V

EXTVCC

EXTV

CC

Switchover Voltage

Oscillator and Phase-Locked Loop

Oscillator Frequency

f

OSC

VCO High

R

PLLIN

PLLIN Input Resistance

Phase Detector Output Current

I

PLLLPF

Sinking Capability

Sourcing Capability

Power-On Reset

POR1 Saturation Voltage

V

SATPOR1

I

LPOR1

V

THPOR1

t

DPOR1

POR1 Leakage

POR1 Trip Voltage

POR1 Delay

q

0.8

1.5

130

200

2

4.5

180

150

5.2

–1

300

4.8

q

4.5

112

200

5.0

– 0.2

170

4.7

125

240

50

15

0.6

0.2

138

10

20

1

–4

– 11

– 7.5

65536

3

LTC1538-AUX/LTC1539

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

Low-Battery Comparator

V

SATLBO

LBO Saturation Voltage

I

LLBO

LBO Leakage

V

THLB1

LBI Trip Voltage

I

INLB1

LBI Input Current

V

HYSLBO

LBO Hysteresis

Auxiliary Regulator/Comparator

AUXDR Current

I

AUXDR

Max Current Sinking Capability

Control Current

Leakage when OFF

I

INAUXFB

AUXFB Input Current

I

INAUXON

AUXON Input Current

V

THAUXON

AUXON Trip Voltage

V

SATAUXDR

AUXDR Saturation Voltage

V

AUXFB

AUXFB Voltage

V

THAUXDR

AUXFB Divider Disconnect Voltage

T

A

= 25°C, V

IN

= 15V, V

RUN/SS1,2

= 5V unless otherwise noted.

MIN

TYP

0.6

0.01

1.19

1

20

MAX

1

1.22

50

UNITS

V

µA

V

nA

mV

CONDITIONS

I

LBO

= 1.6mA, V

LBI

= 1.1V

V

LBO

= 12V, V

LBI

= 1.4V

High to Low Transition on LBO

V

LBI

= 1.19V

q

1.16

V

EXTVCC

= 0V

V

AUXDR

= 4V, V

AUXFB

= 1.0V, V

AUXON

= 5V

V

AUXDR

= 5V, V

AUXFB

= 1.5V, V

AUXON

= 5V

V

AUXDR

= 24V, V

AUXFB

= 1.5V, V

AUXON

= 0V

V

AUXFB

= 1.19V, V

AUXON

= 5V

V

AUXON

= 5V

V

AUXDR

= 4V, V

AUXFB

= 1V

I

AUXDR

= 1.6mA, V

AUXFB

= 1V, V

AUXON

= 5V

V

AUXON

= 5V, 11V < V

AUXDR

< 24V (Note 5)

V

AUXON

= 5V, 3V < V

AUXDR

< 7V

V

AUXON

= 5V (Note 5); Ramping Negative

10

1.0

q

11.5

1.14

7.5

15

1

0.01

1.19

0.4

12.00

1.19

8.5

5

1

1.4

0.8

12.5

1.24

9.5

mA

µA

V

The

q

denotes specifications which apply over the full operating

temperature range.

Note 1:

T

J

is calculated from the ambient temperature T

A

and power

dissipation P

D

according to the following formulas:

LTC1538CG-AUX: T

J

= T

A

+ (P

D

)(95°C/W)

LTC1539CGW: T

J

= T

A

+ (P

D

)(85°C/W)

Note 2:

The LTC1538-AUX and LTC1539 are tested in a feedback loop

which servos V

OSENSE1,2

to the balance point for the error amplifier

(V

ITH1,2

= 1.19V).

Note 3:

Dynamic supply current is higher due to the gate charge being

delivered at the switching frequency. See Applications Information.

Note 4:

Oscillator frequency is tested by measuring the C

OSC

charge and

discharge current (I

OSC

) and applying the formula:

f

OSC

(kHz) = 8.4(10

8

)[C

OSC

(pF) + 11]

-1

(1/I

CHG

+ 1/I

DISC

)

–1

Note 5:

The auxiliary regulator is tested in a feedback loop which servos

V

AUXFB

to the balance point for the error amplifier. For applications with

V

AUXDR

> 9.5V, V

AUXFB

uses an internal resistive divider. See Applications

Information section.

4

LTC1538-AUX/LTC1539

TYPICAL PERFORMANCE CHARACTERISTICS

Efficiency vs Input Voltage:

V

OUT

= 3.3V

100

V

OUT

= 3.3V

95

I

LOAD

= 1A

EFFICIENCY (%)

90

85

I

LOAD

= 100mA

80

75

70

0

5

90

I

LOAD

= 100mA

85

80

75

70

10

15

20

INPUT VOLTAGE (V)

25

30

0

5

95

I

LOAD

= 1A

EFFICIENCY (%)

V

IN

– V

OUT

Dropout Voltage vs

Load Current

0.5

0

R

SENSE

= 0.033Ω

V

OUT

DROP OF 5%

0.4

V

IN

– V

OUT

(V)

∆V

OUT

(%)

– 0.75

–1.00

V

ITH

(V)

0.3

0.2

0.1

0

0.5

1.0

1.5

2.0

LOAD CURRENT (A)

2.5

3.0

Input Supply Current

vs Input Voltage

INTV

CC

PERCENT CHANGE, NORMALIZED (V)

2.5

2.0

SUPPLY CURRENT (mA)

5V, 3.3V OFF

5V STANDBY

1.5

60

70°C

EXTV

CC

– INTV

CC

(mV)

1.0

5V, 3.3V ON

5V OFF, 3.3V ON

0.5

5V ON, 3.3V OFF

0

5

10

15

20

INPUT VOLTAGE (V)

25

30

LTC1538/39 • TPC07

Adaptive Power and Burst Mode are trademarks of Linear Technology Corporation.

U W

1538/39 • G01

1538/39 • G04

Efficiency vs Input Voltage:

V

OUT

= 5V

100

V

OUT

= 5V

100

95

90

85

80

75

70

65

60

55

Efficiency vs Load Current

V

IN

= 10V

V

OUT

= 5V

R

SENSE

= 0.33Ω

CONTINUOUS

MODE

Burst Mode

TM

OPERATION

Adaptive Power

TM

MODE

10

15

20

INPUT VOLTAGE (V)

25

30

50

0.001

1

0.01

0.1

LOAD CURRENT (A)

10

1538/39 • G03

1538/39 • G02

Load Regulation

R

SENSE

= 0.033Ω

– 0.25

– 0.50

V

ITH

Pin Voltage vs Output Current

3.0

2.5

2.0

1.5

Burst Mode

OPERATION

1.0

0.5

0

10 20 30 40 50 60 70 80 90 100

OUTPUT CURRENT (%)

1538/39 • G06

CONTINUOUS/

Adaptive Power

MODE

–1.25

–1.50

0

0.5

1.0

1.5

2.0

LOAD CURRENT (A)

2.5

3.0

1538/39 • G05

INTV

CC

Regulation

vs INTV

CC

Load Current

100

2

EXTV

CC

= 0V

1

EXTV

CC

Switch Drop

vs INTV

CC

Load Current

300

80

5V STANDBY CURRENT (µA)

70°C

200

25°C

– 45°C

100

0

25°C

–1

40

20

0

–2

0

20

30

40

10

INTV

CC

LOAD CURRENT (mA)

50

0

5

15

20

25

10

INTV

CC

LOAD CURRENT (mA)

30

1538/39 • G08

1538/39 • G09

5

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Maker	ADI
package instruction	SSOP,
Reach Compliance Code	not_compliant
ECCN code	EAR99
Analog Integrated Circuits - Other Types	SWITCHING CONTROLLER
control mode	CURRENT-MODE
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	36 V
Minimum input voltage	3.5 V
Nominal input voltage	15 V
JESD-30 code	R-PDSO-G28
JESD-609 code	e0
length	10.2 mm
Humidity sensitivity level	1
Number of functions	1
Number of terminals	28
Maximum operating temperature	70 °C
Minimum operating temperature
Maximum output current	2 A
Nominal output voltage	5 V
Package body material	PLASTIC/EPOXY
encapsulated code	SSOP
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, SHRINK PITCH
Peak Reflow Temperature (Celsius)	235
Certification status	Not Qualified
Maximum seat height	2 mm
surface mount	YES
Switch configuration	PUSH-PULL
Maximum switching frequency	400 kHz
technology	CMOS
Temperature level	COMMERCIAL
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	GULL WING
Terminal pitch	0.65 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	20
width	5.3 mm

	LTC1538CG-AUX#TR	LTC1538IG-AUX#TR	LTC1538CG-AUX#TRPBF	LTC1539IGW#PBF	LTC1539IGW#TR	LTC1538IG-AUX#PBF	LTC1539IGW#TRPBF	LTC1539CGW#TR	LTC1538CG-AUX#PBF	LTC1538IG-AUX#TRPBF
Description	Switching Voltage Regulators LTC1538-AUX - Dual High Efficiency,Low Noise, Synchronous Step-Down Switching Regulators	Switching Voltage Regulators LTC1538-AUX - Dual High Efficiency,Low Noise, Synchronous Step-Down Switching Regulators	Switching Voltage Regulators Dual Const Freq Syn Sw Reg Cntrl	Switching Voltage Regulators Dual Const Freq Syn Sw Reg Cntrl	Switching Voltage Regulators LTC1539 - Dual High Efficiency, Low Noise, Synchronous Step-Down Switching Regulators	Switching Voltage Regulators Dual Const Freq Syn Sw Reg Cntrl	Switching Voltage Regulators Dual Const Freq Syn Sw Reg Cntrl	Switching Regulator LTC1539 - Dual High Efficiency, Low Noise, Synchronous Step-Down Switching Regulators	Switching Regulator Dual Const Freq Syn Sw Reg Cntrl	Switching Regulator Dual Const Freq Syn Sw Reg Cntrl
Is it Rohs certified?	incompatible	incompatible	conform to	conform to	incompatible	conform to	conform to	incompatible	conform to	conform to
Maker	ADI	ADI	ADI	ADI	ADI	ADI	ADI	ADI	ADI	ADI
Reach Compliance Code	not_compliant	not_compliant	compliant	compliant	not_compliant	compliant	compliant	not_compliant	compliant	compliant
control mode	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE	CURRENT-MODE
JESD-30 code	R-PDSO-G28	R-PDSO-G28	R-PDSO-G28	R-PDSO-G36	R-PDSO-G36	R-PDSO-G28	R-PDSO-G36	R-PDSO-G36	R-PDSO-G28	R-PDSO-G28
JESD-609 code	e0	e0	e3	e3	e0	e3	e3	e0	e3	e3
Number of terminals	28	28	28	36	36	28	36	36	28	28
Maximum operating temperature	70 °C	85 °C	70 °C	85 °C	85 °C	85 °C	85 °C	70 °C	70 °C	85 °C
Minimum operating temperature	-	-40 °C	-	-40 °C	-40 °C	-40 °C	-40 °C	-	-	-40 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP	SSOP
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH	SMALL OUTLINE, SHRINK PITCH
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
surface mount	YES	YES	YES	YES	YES	YES	YES	YES	YES	YES
Maximum switching frequency	400 kHz	138 kHz	400 kHz	400 kHz	138 kHz	400 kHz	400 kHz	400 kHz	400 kHz	138 kHz
technology	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Temperature level	COMMERCIAL	INDUSTRIAL	COMMERCIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	COMMERCIAL	COMMERCIAL	INDUSTRIAL
Terminal surface	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)	Matte Tin (Sn)	MATTE TIN	Tin/Lead (Sn/Pb)	MATTE TIN	Matte Tin (Sn)	Tin/Lead (Sn/Pb)	MATTE TIN	Matte Tin (Sn)
Terminal form	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING	GULL WING
Terminal pitch	0.65 mm	0.635 mm	0.65 mm	0.8 mm	0.8 mm	0.65 mm	0.8 mm	0.8 mm	0.65 mm	0.635 mm
Terminal location	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL	DUAL
package instruction	SSOP,	-	SSOP,	SSOP,	-	SSOP,	SSOP,	SSOP,	SSOP,	SSOP, SSOP28,.3
Analog Integrated Circuits - Other Types	SWITCHING CONTROLLER	-	SWITCHING CONTROLLER	SWITCHING CONTROLLER	-	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	SWITCHING CONTROLLER	-
Control Technology	PULSE WIDTH MODULATION	-	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	-	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	-
Maximum input voltage	36 V	-	36 V	36 V	-	36 V	36 V	36 V	36 V	-
Minimum input voltage	3.5 V	-	3.5 V	3.5 V	-	3.5 V	3.5 V	3.5 V	3.5 V	-
Nominal input voltage	15 V	-	15 V	15 V	-	15 V	15 V	15 V	15 V	-
length	10.2 mm	-	10.2 mm	15.4 mm	-	10.2 mm	15.4 mm	15.4 mm	10.2 mm	-
Humidity sensitivity level	1	-	1	1	-	1	1	1	1	1
Number of functions	1	-	1	1	-	1	1	1	1	-
Maximum output current	2 A	-	2 A	2 A	-	2 A	2 A	2 A	2 A	-
Nominal output voltage	5 V	-	5 V	5 V	-	5 V	5 V	5 V	5 V	-
Peak Reflow Temperature (Celsius)	235	-	260	260	-	260	260	235	260	-
Maximum seat height	2 mm	-	2 mm	2.65 mm	-	2 mm	2.65 mm	2.65 mm	2 mm	-
Switch configuration	PUSH-PULL	-	PUSH-PULL	PUSH-PULL	-	PUSH-PULL	PUSH-PULL	PUSH-PULL	PUSH-PULL	-
Maximum time at peak reflow temperature	20	-	30	30	-	30	NOT SPECIFIED	20	30	-
width	5.3 mm	-	5.3 mm	7.5 mm	-	5.3 mm	7.5 mm	7.5 mm	5.3 mm	-
Brand Name	-	-	Analog Devices Inc	Analog Devices Inc	-	Analog Devices Inc	Analog Devices Inc	-	Analog Devices Inc	Analog Devices Inc
Is it lead-free?	-	-	Contains lead	Contains lead	-	Contains lead	Contains lead	-	Contains lead	Contains lead
Contacts	-	-	28	36	-	28	36	-	28	28
Manufacturer packaging code	-	-	05-08-1640 (G28)	05-08-1642 (GW36)	-	05-08-1640 (G28)	05-08-1642 (GW36)	-	05-08-1640 (G28)	05-08-1640 (G28)

LTC1538CG-AUX#TR

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