FAN5362 Datasheet, PDF (4/14 Pages) Fairchild Semiconductor – 3MHz, 500mA / 750mA Synchronous Buck Regulator

Electrical Characteristics
Minimum and maximum values are at VIN = VEN = 2.7V to 5.5V, VMODE = 0V (AUTO Mode), TA = -40°C to +85°C; circuit of
Figure 1, unless otherwise noted. Typical values are at TA = 25°C, VIN = VEN = 3.6V, VMODE = 0V, COUT=10µF.
Symbol
Parameter
Conditions
Power Supplies
IQ Quiescent Current
No Load, Not Switching, VIN > 3V
PWM Mode
I(SD)
VUVLO
Shutdown Supply Current
Under-Voltage Lockout
Threshold
EN = GND
Rising VIN
VUVHYST
Under-Voltage Lockout
Hysteresis
V(ENH) Enable HIGH-Level Input Voltage
V(ENL) Enable LOW-Level Input Voltage
I(EN) Enable Input Leakage Current EN to VIN or GND
V(MH) MODE HIGH-Level Input Voltage
V(ML) MODE LOW-Level Input Voltage
I(M) MODE Input Leakage Current MODE to VIN or GND
Switching and Synchronization
fSW
fSYNC
Switching Frequency⁽⁵⁾
VIN = 3.6V, TA = 25°C
MODE Synchronization Range⁽⁵⁾ Square Wave at MODE Input
Regulation
Min.
1.05
1.05
2.7
1.3
Typ.
45
5
0.05
2.5
175
0.01
0.01
3.0
1.5
Max. Unit
75
µA
mA
1.00
µA
2.6
V
mV
V
0.4
V
1.00
µA
V
0.4
V
1.00
µA
3.3
MHz
1.7
MHz
2.10V
ILOAD = 0 to 750mA
2.50V
VO
Output Voltage
Accuracy
ILOAD = 0 to 400mA, VIN ≥ VOUT +
200mV
ILOAD = 0 to 500mA, VIN ≥ VOUT +
300mV
2.70V, 2.90V,
3.30V
ILOAD = 0 to 400mA, VIN ≥ VOUT +
150mV
ILOAD = 0 to 500mA, VIN ≥ VOUT +
300mV
2.037
(-3%)
2.100
2.163
(+3%)
2.375
(-5%)
2.500
2.575
(+3%)
2.425
(-3%)
2.500
2.575
(+3%)
V
-5%
+3%
-3%
+3%
tSS Soft-Start
Output Driver
From EN Rising Edge
180
300
µs
PMOS On Resistance
RDS(on)
NMOS On Resistance
VIN = VGS = 3.6V
VIN = VGS = 3.6V
330
mΩ
300
mΩ
ILIM(OL) PMOS Peak Current Limit⁽⁵⁾
VOUT = 2.1V
VOUT = 2.5V, 2.7V, 2.9V, 3.3V
1375
mA
800
1000
1150
mA
TTSD Thermal Shutdown
150
°C
THYS Thermal Shutdown Hysteresis
15
°C
Notes:
5. Limited by the effect of tOFF minimum (see Figure 7 in Typical Performance Characteristics).
6. The Electrical Characteristics table reflects open-loop data. Refer to the Operation Description and Typical Characteristics
for closed-loop data.
© 2009 Fairchild Semiconductor Corporation
FAN5362 • Rev. 1.0.1
4
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