FAN4603 Fairchild Semiconductor, FAN4603 Datasheet - Page 4

• Manufacturer Part Number: FAN4603
• Description: The FAN4603 is a fully integrated synchronous DC/DC buck converter that provides up to 600mA of output current over an input voltage ranging from 2
• Manufacturer: Fairchild Semiconductor

© 2009 Fairchild Semiconductor Corporation
FAN4603 • Rev. 1.0.1
Electrical Specifications
Unless otherwise noted, V
3.6V
Note:
3.
Power Supplies
Oscillator
Regulation
Protection
Symbol
V
V
V
UVHYST
V
EN_HYS
T
V
T
f
I
I
I
V
PWM frequency may be lower than specified when limited by t
duty cycle extremes, but output regulation is maintained.
IN
UVLO
OSC
t
I
LIM
HYS
ENH
TSD
SD
ENL
EN
SS
Q
, T
O
A
= 25°C.
Quiescent Current
Shutdown Supply Current
Under-Voltage Lockout Threshold
Under-Voltage Lockout Hysteresis
Enable HIGH-Level Input Voltage
Enable LOW-Level Input Voltage
Enable Logic Input Hysteresis
Enable Input Leakage Current
Oscillator Frequency
Output Voltage Accuracy
Soft-Start Time
Peak Input Current Limit
Thermal Shutdown
Thermal Shutdown Hysteresis
Parameter
IN
= 2.5 to 5.5V, EN = V
(3)
1.82V
1.50V
1.30V
1.23V
1.00V
IN
. T
V
Rising V
EN = V
PWM Mode
I
PWM Mode
I
PWM Mode
I
PWM Mode
I
PWM Mode
I
PWM Mode
Rising EN to V
LOAD
LOAD
LOAD
LOAD
LOAD
A
IN
= -40°C to +85°C, using circuit of Figure 1. Typical values are at
= 3.6V, EN = GND
= 0 to 600mA
= 0 to 600mA
= 0 to 600mA
= 0 to 600mA
= 0 to 600mA
IN
IN
Conditions
or GND
4
ON-min
OUT
Regulation
(minimum on-time) or t
1.784
1.784
1.470
1.470
1.274
1.274
1.207
1.207
0.975
0.975
Min.
1.05
850
5.4
OFF_min
1.820
1.820
1.500
1.500
1.300
1.300
1.233
1.233
1.000
1.000
Typ.
1050
+150
2.15
0.01
+15
150
100
180
0.1
6.0
35
(minimum off-time), at
www.fairchildsemi.com
1.890
1.856
1.560
1.530
1.352
1.326
1.283
1.260
1.050
1.025
Max.
1250
2.25
1.00
300
2.0
0.4
6.6
55
Units
MHz
mV
mV
mA
µA
µA
µA
°C
°C
µs
V
V
V
V