LTC3704EMS#TR datasheet, PDF - EEWORLD Datasheet

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LTC3704EMS#TR: DescriptionDC/DC Cntrlr Single-OUT Inverting 0.05A 1000kHz 10-Pin MSOP T/R; File Size326KB，28 Pages; ManufacturerADI; Websitehttps://www.analog.com

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LTC3704EMS#TR Overview

DC/DC Cntrlr Single-OUT Inverting 0.05A 1000kHz 10-Pin MSOP T/R

LTC3704EMS#TR Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Not Compliant
ECCN (US)	EAR99
Part Status	Unconfirmed
HTS	8542.39.00.01
SVHC	Yes
SVHC Exceeds Threshold	Yes
Number of Outputs	1
Topology	Inverting
Output Voltage (V)	-72(Max)
Maximum Output Current (A)	0.05
Maximum Switching Frequency (kHz)	1000
Minimum Input Voltage (V)	2.5
Maximum Input Voltage (V)	36
Operating Supply Voltage (V)	2.5 to 35
Maximum Supply Current (mA)	1
Minimum Switching Frequency (kHz)	50
Synchronous Rectifier	No
Synchronous Clock	No
Control Method	PWM
Programmability	Yes
Minimum Operating Temperature (°C)	-40
Maximum Operating Temperature (°C)	85
Supplier Temperature Grade	Extended
Packaging	Tape and Reel
Pin Count	10
Standard Package Name	MSOP
Supplier Package	MSOP
Mounting	Surface Mount
Package Height	0.86
Package Length	3
Package Width	3
PCB changed	10
Lead Shape	Gull-wing

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LTC3704

Wide Input Range, No R

SENSE

Positive-to-Negative DC/DC Controller

FEATURES

■

DESCRIPTIO

High Efficiency Operation (No Sense

Resistor Required)

Wide Input Voltage Range: 2.5V to 36V

Current Mode Control Provides Excellent Transient

Response

High Maximum Duty Cycle (Typ 92%)

±1%

Internal Voltage Reference

±2%

RUN Pin Threshold with 100mV Hysteresis

Micropower Shutdown: I

= 10μA

Programmable Switching Frequency

(50kHz to 1MHz) with One External Resistor

Synchronizable to an External Clock Up to 1.3

OSC

User-Controlled Pulse Skip or Burst Mode

Operation

Internal 5.2V Low Dropout Voltage Regulator

Capable of Operating with a Sense Resistor for High

Output Voltage Applications (V

>36V)

Small 10-Lead MSOP Package

The LTC

3704 is a wide input range, current mode,

positive-to-negative DC/DC controller that drives an

N-channel power MOSFET and requires very few external

components. Intended for low to high power applications,

it eliminates the need for a current sense resistor by

utilizing the power MOSFET’s on-resistance, thereby maxi-

mizing efficiency.

The IC’s operating frequency can be set with an external

resistor over a 50kHz to 1MHz range, and can be synchro-

nized to an external clock using the MODE/SYNC pin.

Burst Mode operation at light loads, a low minimum

operating supply voltage of 2.5V and a low shutdown

quiescent current of 10μA make the LTC3704 ideally

suited for battery-operated systems.

For applications requiring constant frequency operation,

the Burst Mode operation feature can be defeated using

the MODE/SYNC pin. Higher than 36V switch voltage

applications are possible with the LTC3704 by connecting

the SENSE pin to a resistor in the source of the power

MOSFET.

The LTC3704 is available in the 10-lead MSOP package.

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

Mode is a registered trademark of Linear Technology Corporation. No R

SENSE

is a

registered trademark of Linear Technology Corporation. All other trademarks are the

property of their respective owners. Protected by U.S. Patents including 5847554, 5731694.

APPLICATIO S

■

SLIC Power Supplies

Telecom Power Supplies

Portable Electronic Equipment

Cable and DSL Modems

Router Supplies

TYPICAL APPLICATIO

RUN

LTC3704

NFB

FREQ

MODE/SYNC

4.7nF

80.6k

FB1

1.21k

FB2

3.65k

INTV

GATE

GND

SENSE

•

L1*

5V to 15V

OUT

–5.0V

3A to 5A

L2*

•

47μF

EFFICIENCY (%)

VCC

4.7μF

47μF

OUT

100μF

(X2)

GND

3704 TA01

, C

: TDK C5750X5R1C476M

OUT

: TDK C5750X5R0J107M

VCC

: TAIYO YUDEN LMK316BJ475ML

D1: MBRD835L (ON SEMICONDUCTOR)

L1, L2: BH ELECTRONICS BH510-1009

M1: Si4884 (SILICONIX/VISHAY)

Figure 1. High Efficiency Positive to Negative Supply

3704fb

Conversion Efficiency

100

= 10V

0.001

0.01

1.0

0.1

OUTPUT CURRENT (A)

3704 TA01b

= 5V

= 15V

LTC3704EMS#TR Related Products

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Description	DC/DC Cntrlr Single-OUT Inverting 0.05A 1000kHz 10-Pin MSOP T/R	DC/DC Cntrlr Single-OUT Inverting 0.05A 1000kHz 10-Pin MSOP Tube	DC/DC Cntrlr Single-OUT Inverting 0.05A 1000kHz 10-Pin MSOP T/R	ZENER DIODE	DC/DC Cntrlr Single-OUT Inverting 0.05A 1000kHz 10-Pin MSOP Tube	DC/DC Cntrlr Single-OUT Inverting 0.05A 1000kHz 10-Pin MSOP T/R	DC/DC Cntrlr Single-OUT Inverting 0.05A 1000kHz 10-Pin MSOP T/R	DC/DC Cntrlr Single-OUT Inverting 0.05A 1000kHz 10-Pin MSOP
EU restricts the use of certain hazardous substances	Not Compliant	Compliant	Compliant	-	Compliant	Not Compliant	Compliant	Not Compliant
ECCN (US)	EAR99	EAR99	EAR99	-	EAR99	EAR99	EAR99	EAR99
Part Status	Unconfirmed	Active	Active	-	Active	Unconfirmed	Active	LTB
HTS	8542.39.00.01	8542.39.00.01	8542.39.00.01	-	8542.39.00.01	8542.39.00.01	8542.39.00.01	8542.39.00.01
Number of Outputs	1	1	1	-	1	1	1	1
Topology	Inverting	Inverting	Inverting	-	Inverting	Inverting	Inverting	Inverting
Output Voltage (V)	-72(Max)	-72(Max)	-72(Max)	-	-72(Max)	-72(Max)	-72(Max)	-72(Max)
Maximum Output Current (A)	0.05	0.05	0.05	-	0.05	0.05	0.05	0.05
Maximum Switching Frequency (kHz)	1000	1000	1000	-	1000	1000	1000	1000
Minimum Input Voltage (V)	2.5	2.5	2.5	-	2.5	2.5	2.5	2.5
Maximum Input Voltage (V)	36	36	36	-	36	36	36	36
Operating Supply Voltage (V)	2.5 to 35	2.5 to 35	2.5 to 35	-	2.5 to 35	2.5 to 35	2.5 to 35	2.5 to 35
Maximum Supply Current (mA)	1	1	1	-	1	1	1	1
Minimum Switching Frequency (kHz)	50	50	50	-	50	50	50	50
Synchronous Rectifier	No	No	No	-	No	No	No	No
Synchronous Clock	No	No	No	-	No	No	No	No
Control Method	PWM	PWM	PWM	-	PWM	PWM	PWM	PWM
Programmability	Yes	Yes	Yes	-	Yes	Yes	Yes	Yes
Minimum Operating Temperature (°C)	-40	-40	-40	-	-40	-40	-40	-40
Maximum Operating Temperature (°C)	85	85	85	-	125	125	125	125
Supplier Temperature Grade	Extended	Extended	Extended	-	Industrial	Industrial	Industrial	Industrial
Packaging	Tape and Reel	Tube	Tape and Reel	-	Tube	Tape and Reel	Tape and Reel	-
Pin Count	10	10	10	-	10	10	10	10
Standard Package Name	MSOP	SOP	SOP	-	MSOP	MSOP	MSOP	MSOP
Supplier Package	MSOP	MSOP	MSOP	-	MSOP	MSOP	MSOP	MSOP
Mounting	Surface Mount	Surface Mount	Surface Mount	-	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package Height	0.86	0.86	0.86	-	0.86	0.86	0.86	0.86
Package Length	3	3	3	-	3	3	3	3
Package Width	3	3	3	-	3	3	3	3
PCB changed	10	10	10	-	10	10	10	10
Lead Shape	Gull-wing	Gull-wing	Gull-wing	-	Gull-wing	Gull-wing	Gull-wing	Gull-wing

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