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參數(shù)資料
| 型號(hào)： | ML4902 |
| 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（5V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（5V的到1.8?3.5V的變換）） |
| 文件頁數(shù)： | 6/12頁 |
| 文件大?。?/td> | 280K |
| 代理商： | ML4902 |
ML4902
6
Figure 1. Typical VRM Circuit
FUNCTIONAL DESCRIPTION
(Continued)
UNDERVOLTAGE LOCKOUT
The ML4902 has hysteretic undervoltage lockout
protection circuits for both the 12V (V
DD
) and 5V (V
CC
)
supplies. During an input undervoltage condition, the
internal reference and voltage monitor circuits remain in
operation, but N DRV H and N DRV L are disabled and
the PWR GOOD output will be false (low).
COMPENSATION
The COMP pin is connected to the output of the
transconductance amplifier which forms the gain block
for the proportional control loop of the ML4902. An RC
network from this pin to GND is used to compensate the
amplifier.
VID4
R5
100
12VIN
5VIN
C4-C9
L2
1.4μH
R4
470k
C13
1nF
C14
220nF
16V
C20
22μF
25V
C10
220nF
16V
C12
220nF
16V
R3
1M
OUTEN
VID0
VID1
VID2
VID3
PWRGD
C3
C1
C2
Q1, Q2
2X IRF7413
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
R2
1k
C11
220nF
16V
Q3, Q4
2X IRF7413
VCCP
VSS
C1 - C9 - 1500μF, 6.3V, Sanyo 6MV1500GX
C15, C19 - 100nF ceramic
U1
ML4902
C15
C19
R1
12
C22
1nF
PROTECT
VDD
VCC
N DRV H
N DRV L
PWR GND
NC
COMP
ISENSE
VFB
D0
D1
D2
D3
RANGE
SHDN
NC
PWR GOOD
VREF
GND
L1
1μH
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| ML4903 | 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）) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML4902CT | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:High Current Synchronous Buck Controller |
| ML4902CT UP WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML4902CTX | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML4903 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:High Current Synchronous Buck Controller |
| ML4903CT | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel 制造商:Fairchild Semiconductor Corporation 功能描述: |
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