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ML4902 Datasheet(PDF) 2 Page - Micro Linear Corporation

Part # ML4902
Description  High Current Synchronous Buck Controller
Download  12 Pages
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Manufacturer  MICRO-LINEAR [Micro Linear Corporation]
Direct Link  http://www.microlinear.com
Logo MICRO-LINEAR - Micro Linear Corporation

ML4902 Datasheet(HTML) 2 Page - Micro Linear Corporation

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ML4902
2
PIN CONFIGURATION
PIN
NAME
FUNCTION
1
D0
LSB input to the DAC which sets the
output voltage
2
D1
Input to the DAC which sets the
output voltage
3
D2
Input to the DAC which sets the
output voltage
4
D3
MSB input to the DAC which sets the
output voltage
5
RANGE
Range selection bit for the 2 chord 4-
bit DAC. Logic 1 sets the range at
2.1V to 3.5V with an LSB of 100mV.
Logic 0 sets the range at 1.8V to
2.05V with an LSB of 50mV
6
SHDN
Grounding this pin shuts down the
regulator
8
PWR GOOD This open drain output goes low
whenever SHDN goes low or when
the output is not within +10% of its
nominal value
PIN
NAME
FUNCTION
9VREF
Bypass connection for the internal
3.5V reference
10
GND
Analog signal ground
11
VFB
Output voltage feedback pin
12
ISENSE
Current sense input
13
COMP
Connection for the compensation and
optional soft-start delay network
15
PWR GND
Power ground
16
N DRV L
Synchronous rectifier driver output
17
N DRV H
Buck switch driver output
18
VCC
Connection point for monitoring the
5V supply to determine the proper
condition of PWR GOOD
19
VDD
12V power supply input
20
PROTECT
Connection for the integrating current
limit network
PIN DESCRIPTION
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
TOP VIEW
ML4902
20-Pin TSSOP (T20)
D0
D1
D2
D3
RANGE
SHDN
NC
PWR GOOD
VREF
GND
PROTECT
VDD
VCC
N DRV H
N DRV L
PWR GND
NC
COMP
ISENSE
VFB


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