Datasheet

3
LT1510/LT1510-5
ELECTRICAL CHARACTERISTICS
V
CC
= 16V, V
BAT
= 8V, V
MAX
(maximum operating V
CC
) = 28V, no load on any outputs, unless otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Overall
Minimum Input Operating Voltage Undervoltage Lockout ● 6.2 7 7.8 V
Reverse Current from Battery (When V
CC
Is Not V
BAT
≤ 20V, 0°C ≤ T
J
≤ 70°C ● 315 µA
Connected, V
SW
Is Floating)
Boost Pin Current V
CC
– V
BOOST
≤ 20V ● 0.10 20 µA
20V < V
CC
– V
BOOST
≤ 28V ● 0.25 30 µA
2V ≤ V
BOOST
– V
CC
≤ 8V (Switch ON) ● 611 mA
8V < V
BOOST
– V
CC
≤ 25V (Switch ON) ● 814 mA
Switch
Switch ON Resistance V
CC
= 10V
I
SW
= 1.5A, V
BOOST
– V
SW
≥ 2V (Note 4) ● 0.3 0.5 Ω
I
SW
= 1A, V
BOOST
– V
SW
< 2V (Unboosted) ● 2.0 Ω
∆I
BOOST
/∆I
SW
During Switch ON V
BOOST
= 24V, I
SW
≤ 1A 20 35 mA/A
Switch OFF Leakage Current V
SW
= 0V, V
CC
≤ 20V ● 2 100 µA
20V < V
CC
≤ 28V ● 4 200 µA
Maximum V
BAT
with Switch ON ● V
CC
– 2 V
Minimum I
PROG
for Switch ON 2420 µA
Minimum I
PROG
for Switch OFF at V
PROG
≤ 1V ● 1 2.4 mA
Current Sense Amplifier Inputs (SENSE, BAT)
Sense Resistance (R
S1
) 0.08 0.12 Ω
Total Resistance from SENSE to BAT (Note 3) 0.2 0.25 Ω
BAT Bias Current (Note 5) V
C
< 0.3V –200 –375 µA
V
C
> 0.6V 700 1300 µA
Input Common Mode Limit (Low) ● –0.25 V
Input Common Mode Limit (High) ● V
CC
– 2 V
Reference
Reference Voltage (Note 1) S8 Package R
PROG
= 4.93k, Measured at PROG Pin ● 2.415 2.465 2.515 V
Reference Voltage (Note 2) 16-Pin R
PROG
= 3.28k, Measured at OVP with 2.453 2.465 2.477 V
VA Supplying I
PROG
and Switch OFF
Reference Voltage Tolerance, 16-Pin Only 8V ≤ V
CC
≤ 28V, 0°C ≤ T
J
≤ 70°C ● 2.446 2.465 2.480 V
8V ≤ V
CC
≤ 28V, 0°C ≤ T
J
≤ 125°C ● 2.441 2.489 V
8V ≤ V
CC
≤ 28V, T
J
< 0°C ● 2.430 2.489 V
Oscillator
Switching Frequency LT1510 180 200 220 kHz
LT1510-5 440 500 550 kHz
Switching Frequency Tolerance All Conditions of V
CC
, Temperature, LT1510 ● 170 200 230 kHz
LT1510, T
J
< 0°C ● 160 230 kHz
LT1510-5
● 425 500 575 kHz
LT1510-5, T
J
< 0°C ● 400 575 kHz
Maximum Duty Cycle LT1510 ● 87 %
LT1510, T
A
= 25°C (Note 8) 90 93 %
LT1510-5 (Note 9) ● 77 81 %