LTC3900E............................................. –40°C to 85°C
LTC3900I............................................ –40°C to 125°C
Junction Temperature ........................................... 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 130°C/W
ORDER INFORMATION
LEAD FREE FINISH
LTC3900ES8#PBF
LTC3900IS8#PBF
LEAD BASED FINISH
LTC3900ES8
LTC3900IS8
TAPE AND REEL
LTC3900ES8#TRPBF
LTC3900IS8#TRPBF
TAPE AND REEL
LTC3900ES8#TR
LTC3900IS8#TR
PART MARKING*
3900
3900
PART MARKING*
3900
3900
PACKAGE DESCRIPTION
8-Lead Plastic Small Outline
8-Lead Plastic Small Outline
PACKAGE DESCRIPTION
8-Lead Plastic Small Outline
8-Lead Plastic Small Outline
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS
SYMBOL
V
CC
V
UVLO
I
VCC
Timer
V
TMR
I
TMR
t
TMRDIS
V
TMRMAX
Timer Threshold Voltage
Timer Input Current
Timer Discharge Time
Timer Pin Clamp Voltage
PARAMETER
Supply Voltage Range
V
CC
Undervoltage Lockout Threshold
V
CC
Undervoltage Lockout Hysteresis
V
CC
Supply Current
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V unless otherwise specified. (Note 3)
CONDITIONS
l
MIN
4.5
l
l
l
l
TYP
5
4.1
0.5
0.5
7
MAX
11
4.5
1
15
10%
–10
120
UNITS
V
V
V
mA
mA
V
μA
ns
V
Rising Edge
Rising Edge to Falling Edge
V
SYNC
= 0V
f
SYNC
= 100kHz, C
FG
= C
CG
= 4700pF (Note 4)
–10%
V
CC
/5
–6
40
2.5
V
TMR
= 0V
C
TMR
= 1000pF, R
TMR
= 4.7k
C
TMR
= 1000pF, R
TMR
= 4.7k
l
l
3900fa
2
LTC3900
ELECTRICAL CHARACTERISTICS
SYMBOL
Current Sense
I
CS
+
I
CS
–
V
CSMAX
V
CS
SYNC Input
I
SYNC
V
SYNCP
V
SYNCN
Driver Output
R
ONH
R
ONL
I
PK
t
d
t
SYNC
t
r
, t
f
Driver Pull-Up Resistance
Driver Pull-Down Resistance
Driver Peak Output Current
SYNC Input to Driver Output Delay
Minimum SYNC Pulse Width
Driver Rise/Fall Time
I
OUT
= –100mA
I
OUT
= 100mA
(Note 6)
C
FG
= C
CG
= 4700pF, V
SYNC
= ±5V
V
SYNC
= ±5V
C
FG
= C
CG
= 4700pF, V
SYNC
= ±5V
l
l
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V unless otherwise specified. (Note 3)
PARAMETER
CS
+
Input Current
CS
–
Input Current
CS
+
Pin Clamp Voltage
Current Sense Threshold Voltage
CONDITIONS
V
CS
+ = 0V
V
CS
– = 0V
I
IN
= 5mA, V
SYNC
= –5V
V
CS
– = 0V
(Note 5)
V
SYNC
= ±10V
(Note 6)
l
l
l
l
l
l
MIN
TYP
MAX
±1
±1
UNITS
μA
μA
V
mV
mV
μA
V
V
V
V
Ω
Ω
Ω
Ω
A
11
7.5
3
10.5
13.5
18
±10
1.8
–1.0
SYNC Input Current
SYNC Input Positive Threshold
SYNC Positive Input Hysteresis
SYNC Input Negative Threshold
SYNC Negative Input Hysteresis
±1
1.0
–1.8
1.4
0.2
–1.4
0.2
0.9
0.9
2
60
75
15
(Note 6)
1.2
1.6
1.2
1.6
Switching Characteristics (Note 7)
120
ns
ns
ns
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
The LTC3900E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design; characterization and correlation
with statistical process controls. The LTC3900I is guaranteed to meet
performance specifications over the full –40°C to 125°C operating
temperature range.
Note 3:
All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specified.
Note 4:
Supply current in normal operation is dominated by the current
needed to charge and discharge the external MOSFET gates. This current
will vary with supply voltage, switching frequency and the external
MOSFETs used.
Note 5:
The current sense comparator threshold has a 0.33%/°C
temperature coefficient (TC) to match the TC of the external MOSFET
R
DS(ON)
.
Note 6:
Guaranteed by design, not subject to test.
Note 7:
Rise and fall times are measured using 10% and 90% levels. Delay
times are measured from ±1.4V at SYNC input to 20%/80% levels at the
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