FAN5234_10 Datasheet, PDF (5/15 Pages) Fairchild Semiconductor – Dual Mobile-Friendly PWM / PFM Controller

Electrical Characteristics
Recommended operating conditions, unless otherwise noted.
Symbol
Parameter
Conditions
Power Supplies
IVCC VCC Current
LDRV, HDRV Open;
VSEN Forced Above
Regulation Point
Shutdown (EN-0)
ISINK VIN Current, Sinking
VIN Pin = Input Voltage
Source
ISOURCE VIN Current, Sourcing
ISD VIN Current, Shutdown
VUVLO UVLO Threshold
VIN Pin = GND
Rising VCC
Falling
VUVLOH UVLO Hysteresis
Oscillator
fosc Frequency
VPP Ramp Amplitude
VRAMP Ramp Offset
G
Ramp / VIN Gain
Reference and Soft-Start
VIN > 5V
VIN = 0V
VIN = 16V
VIN > 5V
VIN ≥ 3V
1V < VIN < 3V
VREF Internal Reference Voltage
ISS Soft-Start Current
At Startup
VSS Soft-Start Complete Threshold
PWM Converter
Load Regulation
ISEN VSEN Bias Current
VOUT Pin Input Impedance
IOUT from 0 to 3A,
VIN from 2 to 24V
UVLOTSD Under-Voltage Shutdown
% of Set Point,
2µs Noise Filter
ISNS Over-Current Threshold
UVLO Over-Voltage Threshold
RILIM = 68.5KΩ, Figure 6
% of Set Point,
2µs Noise Filter
Output Drivers
HDRV Output Resistance
Sourcing
Sinking
LDRV Output Resistance
Sourcing
Sinking
Min.
10
7
4.30
4.10
0.1
255
510
0.891
-1
50
40
70
115
113
Typ.
Max. Units
850
5
20
15
4.55
4.27
300
600
2
1.25
0.5
125
250
0.900
5
1.5
1300
µA
15
µA
30
µA
20
µA
1
µA
4.75
V
4.50
0.5
V
345
KHz
690
V
V
mV/V
0.909
V
µA
V
+1
%
80
150
nA
55
65
KΩ
75
80
%
144
172
%
120
µA
8.0
15.0
Ω
3.2
4.0
8.0
15.0
Ω
1.5
2.4
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© 2004 Fairchild Semiconductor Corporation
FAN5234 • Rev. 2.0.0
5
www.fairchildsemi.com