LX1732 Просмотр технического описания (PDF) - Microsemi Corporation
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LX1732 Datasheet PDF : 12 Pages
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INTEGRATED PRODUCTS
LX1732
High Current PFM Boost Converter
PRODUCTION DATA SHEET
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C ≤ TA ≤ 70°C
except where otherwise noted and the following test conditions: VIN = 2V, VOUT = 3.3V, RLOAD = 3kΩ, VSHDN = 2V
Parameter
Symbol
Test Conditions
` PFM Regulator
Operating Voltage
Minimum Operating Voltage
Minimum Start-up Voltage
Start-up Voltage Temperature
Coefficient
Output Voltage Range
VIN
VIN
κSU
VOUT
Steady State Output Current
IOUT
Internal N-FET On-resistance
Switch Current Limit
Switch Pin Leakage Current
Oscillator Frequency
Duty Cycle
RDS(ON)
ISW
ILEAK
fOSC
D
Operating Current
IQ
` Error Amplifier
Voltage Feed Back Threshold
VFB
Voltage Feed Back Input Current IFB
` Shutdown Circuit
SHDN Input Bias Current
ISHDN
IOUT ≅ 1mA
TA = +25°C; IOUT < 10mA
VOUT = 3.3V: GBNT
VOUT = 5V: GBNT
ILX = 100mA
VLX = 5.5V, VOUT = 5V
VFB = 1V; TA = +25°C
VFB = 1V; TA = +25°C
(into VC pin)
TA = +25°C
VFB = 1.4V
SHDN = GND
SHDN High Input Voltage
VSHDN
SHDN Low Input Voltage
Shutdown Operating Current
` Low Battery Detect
Low Battery Detect Output
Voltage
Low Battery Detect Output
Leakage Current
Low Battery Threshold
Hysteresis
VSHDN
IQ
SHDN = GND
V LBO
I LBO
VLBT
VHLBT
VLBI = 0V, ILBO = -1mA
VLBI = VIN, VLBO = 5V
TA = +25°C
LX1732
Units
Min Typ Max
1.1
5.5
V
0.7
V
1.1
V
-2
mV/°C
2.2
5.5
V
250
100
mA
0.2
1.0
Ω
0.47
1.0
A
1.0 µA
65 100 135 kHz
65
75
85
%
200 µA
1.170 1.200 1.230 V
300 nA
VIN/2
100 nA
V
0.4
V
1
µA
0.5
V
1
µA
0.54
0.71 V
80
Copyright © 2000
Rev. 1.1c, 2005-03-03
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
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