Datasheet

LT1110
3
V
CESAT
Switch Saturation Voltage V
IN
= 1.5V, I
SW
= 400mA 300 400 mV
Step-Up Mode ● 600 mV
V
IN
= 1.5V, I
SW
= 500mA 400 550 mV
● 750 mV
V
IN
= 5V, I
SW
= 1A 700 1000 mV
A
V
A2 Error Amp Gain R
L
= 100kΩ (Note 3) ● 1000 5000 V/V
I
REV
Reverse Battery Current (Note 4) 750 mA
I
LIM
Current Limit 220Ω Between I
LIM
and V
IN
400 mA
Current Limit Temperature – 0.3 %/°C
Coefficient
I
LEAK
Switch OFF Leakage Current Measured at SW1 Pin 1 10 µA
V
SW2
Maximum Excursion Below GND I
SW1
≤ 10µA, Switch Off – 400 – 350 mV
E
LECTR
IC
AL C CHARA TERIST
ICS
T
A
= 25°C, V
IN
= 1.5V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Note 3: 100kΩ resistor connected between a 5V source and the AO pin.
Note 4: The LT1110 is guaranteed to withstand continuous application of
+1.6V applied to the GND and SW2 pins while V
IN
, I
LIM
, and SW1 pins are
grounded.
The ● denotes the specifications which apply over the full operating
temperature range.
Note 1: This specification guarantees that both the high and low trip point
of the comparator fall within the 210mV to 230mV range.
Note 2: This specification guarantees that the output voltage of the fixed
versions will always fall within the specified range. The waveform at the
sense pin will exhibit a sawtooth shape due to the comparator hysteresis.
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
Oscillator Frequency Oscillator Frequency Switch On Time
INPUT VOLTAGE (V)
0
64
FREQUENCY (KHz)
66
70
72
74
78
80
36
912
LT1110 • TPC02
15 18 21
62
60
24
27
30
68
76
TEMPERATURE (°C)
ON TIME (µs)
–50 –25 0 25
LT1110 • TPC03
50 75 100
14
13
12
11
10
9
8
7
TEMPERATURE (°C)
–50
40
OSCILLATOR FREQUENCY (KHz)
50
60
70
80
90
100
–25 0
25
50
LT1110 • TPC01
75
100