APW7302B
Recommended Operating Conditions (Cont.) (Note 3)
Symbol
Parameter
Range
-40 ~ 85
-40 ~ 125
Unit
oC
oC
TA
TJ
Ambient Temperature
Junction Temperature
Note 3: Refer to the typical application circuit.
Electrical Characteristics
Unless otherwise specified, these specifications apply over VIN=12V, VOUT= 3.3V, VEN=3V and TA=25oC.
APW7302B
Typ.
Symbol
Parameter
Test Conditions
Unit
Min.
Max.
SUPPLY CURRENT
IVIN
VIN Supply Current
VFB=1V, VEN=3V, LX=NC
VEN=0V
-
-
1.9
20
-
-
mA
IVIN_SD VIN Shutdown Supply Current
POWER-ON-RESET (POR)
VIN POR Voltage Threshold
VIN POR Hysteresis
mA
VIN Rising
3.9
-
4.1
0.5
4.3
-
V
V
REFERENCE VOLTAGE
VREF
Reference Voltage
Regulated on FB pin
0.9
0.92
0.94
V
OSCILLATOR AND DUTY CYCLE
FOSC
Oscillator Frequency
Foldback Frequency
Maximum Converter’s Duty
Minimum On Time
310
340
110
90
370
kHz
kHz
%
VFB=0V
-
-
-
-
-
-
(Note 4)
220
ns
PFM MODE OPERATION
IPK_PFM PFM Mode Current Limit
-
0.7
-
-
A
A
IPK_TH
PWM to PFM Inductor Peak Threshold
0.4
1
POWER MOSFET
High/low Side MOSFET On Resistance IOUT=2A
-
-
130
-
-
mW
mA
High/Low Side MOSFET Leakage
Current
VEN=0V
10
CURRENT-MODE PWM CONVERTER
Gm
Error Amplifier Transconductance
Error Amplifier Voltage Gain
-
-
800
400
-
-
mA/V
COMP=NC (Note 4)
V/V
Switch Current to COMP Voltage
Transconductance
-
4.5
-
A/V
PROTECTIONS
ILIM
High Side MOSFET Current-Limit
Peak Current
-
-
-
-
-
3.5
1
-
-
-
-
-
A
A
Low Side MOSFET Current-Limit
Over-Temperature Trip Point
Over-Temperature Hysteresis
Over-Voltage Protection
From Drain to Source
(Note 4)
TOTP
160
50
°C
°C
%
(Note 4)
(Note 4)
120
Copyright ã ANPEC Electronics Corp.
3
www.anpec.com.tw
Rev. A.2 - Jan., 2012
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
