FAN53540 Fairchild Semiconductor, FAN53540 Datasheet - Page 5

• Manufacturer Part Number: FAN53540
• Description: The FAN53540 is a step-down switching voltage regulator that delivers an adjustable output from an input voltage supply of 2
• Manufacturer: Fairchild Semiconductor

© 2011 Fairchild Semiconductor Corporation
FAN53540 • Rev. 1.0.2
Electrical Characteristics
Minimum and maximum values are at V
T
Power Supplies
Logic Pins
V
Power Switch and Protection
Frequency Control
Soft-Start and Output Discharge
Symbol
R
R
V
A
V
OUT



V
V
V
I
T
T
f
I
DS(ON)N
=25°C, V
UVHYST
I
DS(ON)P
V

R
I
V
LIMPK
MODE
OUTL
OUTH
V
I
I
LHYST
SDWN
f
V
UVLO
V
LOAD
HYST
t
REF
LIMIT
I
I
V
SW
REF
SS
OUT
SD
IN
OUT
DIS
Q
OUT
IH
IL
IN
Regulation
Quiescent Current
Shutdown Supply Current
Under-Voltage Lockout Threshold
Under-Voltage Lockout Hysteresis
High-Level Input Voltage
Low-Level Input Voltage
Logic Input Hysteresis Voltage
Input Bias Current
PGOOD Pull-Down Current
PGOOD HIGH Leakage Current
Output Reference DC Accuracy,
Measured at FB Pin
Load Regulation
Line Regulation
FB Pin Leakage Current
Transient Response
P-Channel MOSFET On Resistance
N-Channel MOSFET On Resistance
P-MOS Peak Current Limit
Thermal Shutdown
Thermal Shutdown Hysteresis
Input OVP Shutdown
Oscillator Frequency
MODE Pin Synchronization Range
Regulator Enable to Regulated V
(Rising PGOOD)
Output Discharge Resistance
IN
=5V, and V
OUT
Parameter
=1.2V.
IN
=2.7V to 5.5V, and T
OUT
I
I
EN=GND
V
V
V
V
T
T
AUTO PFM/PWM
MODE=V
2.7V ≤ V
Open Loop
Closed Loop
Rising Threshold
Falling Threshold
External Square-Wave, 30% to 70% Duty
Cycle
EN=0V
Input Tied to GND or 1ΩK Resistor to VIN
FB=0.8V
I
LOAD
LOAD
LOAD
A
A
IN
IN
PGOOD
PGOOD
=25°C, Forced PWM
=-40°C to 85°C, Forced PWM
Rising
Falling
=0, MODE=0 (AUTO PFM/PWM)
=0, MODE=1 (Forced PWM)
Step 0.1A to 1.5A, t
=0.4V
=V
IN
IN
IN
A
≤ 5.5V, I
5
(Forced PWM)
=-40°C to +85°C, unless otherwise noted. Typical values are at
Condition
OUT(DC)
R
=1.5A
=100ns
0.792
0.787
0.784
Min.
1.05
525
2.1
5.8
5.5
2.1
1
0.800
0.800
0.800
–0.02
Typ.
-0.16
0.01
2.67
0.01
365
140
155
600
175
0.1
2.3
-30
7.5
6.1
5.8
2.4
1.2
50
30
33
28
20
1
8
www.fairchildsemi.com
Max. Unit
0.808
0.813
0.824
2.80
1.00
1.00
700
0.4
8.8
3.0
10
MHz
%/A
%/V
kHz
mA
mV
mA
mV
mΩ
mΩ
mV
µA
µA
µA
µA
ms
nA
°C
°C
Ω
V
V
V
V
V
V
V
A
A
V
V