LT1110 Datasheet, PDF (3/16 Pages) Linear Technology – Micropower DC-DC Converter Adjustable and Fixed 5V, 12V

LT1110
ELECTRICAL CHARACTERISTICS T_A = 25°C, V_IN = 1.5V, unless otherwise noted.
SYMBOL
V_CESAT
A_V
I_REV
I_LIM
I_LEAK
V_SW2
PARAMETER
Switch Saturation Voltage
Step-Up Mode
CONDITIONS
V_IN = 1.5V, I_SW = 400mA
V_IN = 1.5V, I_SW = 500mA
A2 Error Amp Gain
Reverse Battery Current
Current Limit
Current Limit Temperature
Coefficient
Switch OFF Leakage Current
Maximum Excursion Below GND
V_IN = 5V, I_SW = 1A
R_L = 100kΩ (Note 3)
(Note 4)
220Ω Between I_LIM and V_IN
Measured at SW1 Pin
I_SW1 ≤ 10µA, Switch Off
MIN
q
q
q
1000
TYP
300
400
700
5000
750
400
– 0.3
1
– 400
MAX
400
600
550
750
1000
10
– 350
UNITS
mV
mV
mV
mV
mV
V/V
mA
mA
%/°C
µA
mV
The q 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.
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.
TYPICAL PERFOR A CE CHARACTERISTICS
Oscillator Frequency
100
90
80
70
60
50
40
–50 –25
0 25 50 75 100
TEMPERATURE (°C)
LT1110 • TPC01
Oscillator Frequency
80
78
76
74
72
70
68
66
64
62
60
0 3 6 9 12 15 18 21 24 27 30
INPUT VOLTAGE (V)
LT1110 • TPC02
Switch On Time
14
13
12
11
10
9
8
7
–50 –25 0 25 50 75 100
TEMPERATURE (°C)
LT1110 • TPC03
3