LT3510
3
3510fe
ELECTRICAL CHARACTERISTICS
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.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Feedback Voltage Line Regulation V
VIN1/2
= 3V to 25V
l
–1 0 1 %
Feedback Voltage Offset Ch 1 to Ch 2 V
VC1/2
= 1V
l
–16 0 16 mV
Feedback Bias Current Ch 1/Ch 2 V
FB1/2
= 0.8V, V
VC1/2
= 1V
l
–200 75 200 nA
Error Amplifi er g
m
Ch 1/Ch 2 V
VC1/2
= 1V, I
VC1/2
= ±5μA
l
150 275 450 μmho
Error Amplifi er Gain Ch 1/Ch 2 1000 V/V
Error Amplifi er to Switch Gain Ch 1/Ch 2 2.2 A/V
Error Amplifi er Source Current Ch 1/Ch 2 V
FB1/2
= 0.6V, V
VC1/2
= 1V 10 15 25 μA
Error Amplifi er Sink Current Ch 1/Ch 2 V
FB1/2
= 1V, V
VC1/2
= 1V 15 20 30 μA
Error Amplifi er High Clamp Ch 1/Ch 2 V
FB1/2
= 0.7V 1.75 2.0 2.25 V
Error Amplifi er Switching Threshold Ch 1/Ch 2 V
OUT1/2
= 5V, R
T
/SYNC = 133k 0.5 0.7 1.0 V
Soft-Start Source Current Ch 1/Ch 2 V
FB1/2
= 0.6V, V
SS1/2
= 0.4V
l
2 3 4.2 μA
Soft-Start V
OH
Ch 1/Ch 2 V
FB1/2
= 0.9V 1.9 2 2.4 V
Soft-Start Sink Current Ch 1/Ch 2 V
FB1/2
= 0.6V, V
SS1/2
= 1V 200 600 1000 μA
Soft-Start V
OL
Ch 1/Ch 2 V
FB1/2
= 0V 50 80 125 mV
Soft-Start to Feedback Offset Ch 1/Ch 2 V
VC1/2
= 1V, V
SS1/2
= 0.4V
l
–16 0 16 mV
Soft-Start Sink Current Ch 1/Ch 2 POR V
SS1/2
= 0.4V (Note 4), V
VC
= 1V 0.5 1.5 2 mA
Soft-Start POR Threshold Ch 1/Ch 2 V
FB1/2
= 0V (Note 4) 55 80 105 mV
Soft-Start Switching Threshold Ch 1/Ch 2 V
FB1/2
= 0V 30 50 70 mV
Power Good Leakage Ch 1/Ch 2 V
FB1/2
= 0.9V, V
PG1/2
= 25V, V
VIN1/2
= 25V, V
OUT
= 5V 0 1 μA
Power Good Threshold Ch 1/Ch 2 V
FB1/2
Rising, PG1/2 = 20k to 5V
l
87 90 93 %
Power Good Hysteresis Ch 1/Ch 2 V
FB1/2
Falling, PG1/2 = 20k to 5V 20 30 50 mV
Power Good Sink Current Ch 1/Ch 2 V
FB1/2
= 0.65V, V
PG1/2
= 0.4V 400 800 1200 μA
Power Good Shutdown Sink Current Ch 1/Ch 2 V
VIN1/2
= 2V, V
FB1/2
= 0V, V
PG1/2
= 0.4V 10 50 100 μA
R
T
/SYNC Reference Voltage V
FB1/2
= 0.9V, I
RT/SYNC
= –40μA 0.93 0.975 1 V
Switching Frequency R
T
/SYNC = 133k, V
FB1/2
= 0.6V, V
BST1/2
= V
SW
+ 3V
R
T
/SYNC = 15.4k, V
FB1/2
= 0.6V, V
BST1/2
= V
SW
+ 3V
200
1.2
250
1.5
300
1.8
kHz
MHz
Switching Phase Angle Ch A to Ch B R
T
/SYNC = 133k, V
FB1/2
= 0.6V, V
BST1/2
= V
SW
+ 3V 120 180 210 Deg
Minimum Boost for 100% Duty Cycle Ch 1/Ch 2 V
FB1/2
= 0.7V, I
RT/SYNC
= –35μA (Note 5), V
OUT
= 0V 1.7 2 V
SYNC Frequency Range V
BST1/2
= V
SW
+ 3V 250 1500 kHz
SYNC Switching Phase Angle Ch A to Ch B SYNC = 250kHz, V
BST1/2
= V
SW
+ 3V 120 180 210 Deg
IND + V
OUT
Current Ch 1/Ch 2 V
VOUT1/2
= 0V, V
FB1/2
= 0.9V
V
VOUT1/2
= 5V
40 70
0
100
1
μA
μA
IND to V
OUT
Maximum Current Ch 1/Ch 2 V
VOUT1/2
= 0.5V (Note 6), V
FB1/2
= 0.7V, V
BST1/2
= 20V
V
VOUT1/2
= 5V (Note 6), R
T
/SYNC = 133k, V
BST1/2
= 20V
2.25
2.5
2.8
2.8
4
4
A
A
Switch Leakage Current Ch 1/Ch 2 V
SW1/2
= 0V, V
VIN1/2 = 25V
l
050 μA
Switch Saturation Voltage Ch 1/Ch 2 I
SW1/2
= 2A, V
BST1/2
= 20V, V
FB1/2
= 0.7V
l
250 400 mV
Boost Current Ch 1/Ch 2 I
SW1/2
= 2A, V
BST1/2
= 20V, V
FB1/2
= 0.7V 25 50 100 mA
Minimum Boost Voltage Ch 1/Ch 2 I
SW1/2
= 2A, V
BST1/2
= 20V, V
FB1/2
= 0.7V (Note 7) 1.4 2.5 V
Note 2: The LT3510EFE is guaranteed to meet performance specifi cations
from 0°C to 125°C junction temperature. Specifi cations over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
J
= 25°C. V
VIN1/2
= 15V, V
BST1/2
= open, V
RT/SYNC
= 2V, V
VOUT1/2
= open,
unless otherwise specifi ed.
