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FAN5236 数据表(PDF) 4 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) 4 Page - Fairchild Semiconductor

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PRODUCT SPECIFICATION
FAN5236
4
REV. 1.1.9 7/12/04
Absolute Maximum Ratings
Absolute maximum ratings are the values beyond which the device may be damaged or have its useful life
impaired. Functional operation under these conditions is not implied.
Recommended Operating Conditions
Note 1: Industrial temperature range (–40 to + 85°C) may be special ordered from Fairchild. Please contact your authorized Fairchild
representative for more information.
14
VIN
Input Voltage. Normally connected to battery, providing voltage feed-forward to set the
amplitude of the internal oscillator ramp. When using the IC for 2-step conversion from 5V
input, connect through 100K to ground, which will set the appropriate ramp gain and
synchronize the channels 90˚ out of phase.
15
PG1
Power Good Flag. An open-drain output that will pull LOW when VSEN is outside of a
±10% range of the 0.9V reference.
16
PG2 /
REF2OUT
Power Good 2. When not in DDR Mode: Open-drain output that pulls LOW when the
VOUT is out of regulation or in a fault condition
Reference Out 2. When in DDR Mode, provides a buffered output of REF2. Typically
used as the VDDQ/2 reference.
18
ILIM2 /
REF2
Current Limit 2. When not in DDR Mode, A resistor from this pin to GND sets the current
limit.
Reference for reg #2 when in DDR Mode. Typically set to VOUT1 / 2.
28
VCC
VCC. This pin powers the chip as well as the LDRV buffers. The IC starts to operate when
voltage on this pin exceeds 4.6V (UVLO rising) and shuts down when it drops below 4.3V
(UVLO falling).
Parameter
Min.
Typ.
Max.
Units
VCC Supply Voltage:
6.5
V
VIN
27
V
BOOT, SW, ISNS, HDRV
33
V
BOOTx to SWx
6.5
V
All Other Pins
–0.3
VCC+0.3
V
Junction Temperature (TJ )
–40
150
°C
Storage Temperature
–65
150
°C
Lead Soldering Temperature, 10 seconds
300
°C
Parameter
Conditions
Min.
Typ.
Max.
Units
Supply Voltage VCC
4.75
5
5.25
V
Supply Voltage VIN
24
V
Ambient Temperature (TA )
Note 1
–10
85
°C
Pin Definitions (continued)
Pin
Number
Pin Name
Pin Function Description


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