LT1107 Datasheet, PDF (3/12 Pages) Linear Technology – Micropower DC/DC Converter Adjustable and Fixed 5V, 12V

LT1107
ELECTRICAL CHARACTERISTICS
V_IN = 3V, military or commercial version, T_A = 25°C, unless otherwise noted.
SYMBOL
A_V
V_SW2
PARAMETER
Gain Block Gain
Current Limit
Current Limit Temperature Coefficient
Switch OFF Leakage Current
Maximum Excursion Below GND
CONDITIONS
R_L = 100k (Note 3)
220Ω to I_LIM to V_IN
Measured at SW1 Pin, V_SW1 = 12V
I_SW1 ≤ 10µA, Switch OFF
MIN TYP MAX
q 1000 6000
400
q
– 0.3
1
10
– 400 – 350
UNITS
V/ V
mA
%/°C
µA
mV
V_IN = 3V, – 55°C ≤ T_A ≤ 125°C, unless otherwise noted.
SYMBOL
I_Q
f_OSC
DC
PARAMETER
Quiescent Current
Oscillator Frequency
Duty Cycle
t_ON
Switch ON Time
Reference Line Regulation
V_SAT
Switch Saturation Voltage, Step-Up Mode
Switch Saturation Voltage, Step-Down Mode
CONDITIONS
Switch OFF
Step-Up Mode
Step-Down Mode, V_IN = 12V
Step-Up Mode
Step-Down Mode, V_IN = 12V
2V ≤ V_IN ≤ 5V, 0°C ≤ T_A ≤ 125°C
2.4V ≤ V_IN ≤ 5V, T_A = – 55°C
0°C ≤ T_A ≤ 125°C, I_SW = 500mA
T_A = – 55°C, I_SW = 400mA
V_IN = 12V, I_SW = 500mA
0°C ≤ T_A ≤ 125°C
T_A = – 55°C
LT1107M
MIN TYP MAX
q
500
q
40
63
95
q
56
69
81
q
45
60
73
q
7
11
15
q
5
9
13
0.2 0.4
0.8
0.5 0.65
0.5 0.65
1.5
2.0
UNITS
µA
kHz
%
%
µs
µs
%/ V
%/ V
V
V
V
V
V_IN = 3V, 0°C ≤ T_A ≤ 70°C, unless otherwise noted.
SYMBOL
I_Q
f_OSC
DC
PARAMETER
Quiescent Current
Oscillator Frequency
Duty Cycle
t_ON
Switch ON Time
Reference Line Regulation
V_SAT
Switch Saturation Voltage, Step-Up Mode
Switch Saturation Voltage, Step-Down Mode
CONDITIONS
Switch OFF
Step-Up Mode
Step-Down Mode, V_IN = 12V
Step-Up Mode
Step-Down Mode, V_IN = 12V
2V ≤ V_IN ≤ 5V
V_IN = 3V, I_SW = 650mA
V_IN = 12V, I_SW = 650mA
LT1107C
MIN TYP MAX
q
450
q
50
63
88
q
62
69
78
q
50
60
70
q
8
11 13.5
q
6
9 12.0
q
0.2 0.7
q
0.5 0.65
q
1.1 1.5
UNITS
µA
kHz
%
%
µs
µs
%/V
V
V
The q denotes specifications which apply over the full operating
temperature range.
Note 1: This specification guarantees that both the high and low trip points
of the comparator fall within the 1.2V to 1.3V range.
Note 2: The output voltage waveform will exhibit a sawtooth shape due to
the comparator hysteresis. The output voltage on the fixed-output versions
will always be within the specified range.
Note 3: 100k resistor connected between a 5V source and the AO pin.
3