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參數(shù)資料
| 型號(hào)： | ML4903 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | High Current Synchronous Buck Controller For DC/DC conversion(用于DC/DC變換的大電流同步補(bǔ)償控制器（12V到1.8V～3.5V變換）) |
| 中文描述： | 高電流同步降壓控制器，用于直流/直流轉(zhuǎn)換（用于直流/直流變換的大電流同步補(bǔ)償控制器（12V的到1.8?3.5V的變換）） |
| 文件頁(yè)數(shù)： | 2/12頁(yè) |
| 文件大?。?/td> | 275K |
| 代理商： | ML4903 |
ML4903
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 GOODThis open drain output goes low
whenever
SHDN
goes low or when
the output is not within +10% of its
nominal value
PIN
NAME
FUNCTION
9
V
REF
Bypass connection for the internal
3.5V reference
10
GND
Analog signal ground
11
V
FB
Output voltage feedback pin
12
I
SENSE
Current sense input
13
COMP
Connection for the compensation and
optional soft-start delay network
15
PWR GND
Power ground
16
N DRV
Synchronous rectifier driver output
17
P DRV
Buck switch driver output
18
V
CC
Connection point for monitoring the
5V supply to determine the proper
condition of PWR GOOD
19
V
DD
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
ML4903
20-Pin TSSOP (T20)
D0
D1
D2
D3
RANGE
SHDN
NC
PWR GOOD
VREF
GND
PROTECT
VDD
VCC
P DRV
N DRV
PWR GND
NC
COMP
ISENSE
VFB
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