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FAN5236 数据表(PDF) 5 Page - Fairchild Semiconductor

部件名 FAN5236
功能描述  Dual Mobile-Friendly DDR / Dual-output PWM Controller
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制造商  FAIRCHILD [Fairchild Semiconductor]
网页  http://www.fairchildsemi.com
标志 FAIRCHILD - Fairchild Semiconductor

FAN5236 数据表(HTML) 5 Page - Fairchild Semiconductor

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FAN5236
PRODUCT SPECIFICATION
REV. 1.1.9 7/12/04
5
Electrical Specifications Recommended operating conditions, unless otherwise noted.
Parameter
Conditions
Min.
Typ.
Max.
Units
Power Supplies
VCC Current
LDRV, HDRV Open, VSEN forced
above regulation point
2.2
3.0
mA
Shut-down (EN=0)
30
µA
VIN Current – Sinking
VIN = 24V
10
30
µA
VIN Current – Sourcing
VIN = 0V
–15
–30
µA
VIN Current – Shut-down
1
µA
UVLO Threshold
Rising VCC
4.3
4.55
4.75
V
Falling
4.1
4.25
4.45
V
UVLO Hysteresis
300
mV
Oscillator
Frequency
255
300
345
KHz
Ramp Amplitude, pk–pk
VIN = 16V
2
V
Ramp Amplitude, pk–pk
VIN = 5V
1.25
V
Ramp Offset
0.5
V
Ramp / VIN Gain
VIN
≥ 3V
125
mV/V
Ramp / VIN Gain
1V < VIN < 3V
250
mV/V
Reference and Soft Start
Internal Reference Voltage
0.891
0.9
0.909
V
Soft Start current (ISS)
at start-up
5
µA
Soft Start Complete Threshold
1.5
V
PWM Converters
Load Regulation
IOUTX from 0 to 5A, VIN from 5 to 24V
-2
+2
%
VSEN Bias Current
50
80
120
nA
VOUT pin input impedance
45
55
65
K
Under-voltage Shutdown
as % of set point. 2
µS noise filter
70
75
80
%
Over-voltage threshold
as % of set point. 2
µS noise filter
115
120
125
%
ISNS Over-Current threshold
RILIM= 68.5KΩ see Figure 11.
112
140
168
µA
Output Drivers
HDRV Output Resistance
Sourcing
12
15
Sinking
2.4
4
LDRV Output Resistance
Sourcing
12
15
Sinking
1.2
2
PG (Power Good Output) and Control pins
Lower Threshold
as % of set point, 2
µS noise filter
–86
–94
%
Upper Threshold
as % of set point, 2
µS noise filter
108
116
%
PG Output Low
IPG = 4mA
0.5
V
Leakage Current
VPULLUP = 5V
1
µA
PG2/REF2OUT Voltage
DDR = 1, 0 mA < IREF2OUT ≤10mA
99
1.01
%
VREF2


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