参数资料
型号: MIC5157YM TR
厂商: Micrel Inc
文件页数: 3/13页
文件大小: 271K
描述: IC REG CTRLR SGL MULTI 14SOIC
标准包装: 2,500
类型: 正,固定式
输出数: 1
输出电压: 3.3V,5V,12V
电流 - 电源: 4.5mA
输入电压: 3 V ~ 36 V
工作温度: -40°C ~ 85°C
封装/外壳: 14-SOIC(0.154",3.90mm 宽)
供应商设备封装: 14-SOIC
包装: 带卷 (TR)
其它名称: MIC5157YMTR
MIC5157YMTR-ND
August 2005
3
MIC5156/5157/5158
MIC5156/5157/5158
Micrel, Inc.
Pin Description MIC5156
     Pin Number
Pin Name
Pin Function
 
1
EN
 
Enable (Input): TTL high enables regulator; TTL low shuts down regulator.
 
2
FLAG
Output Flag (Output): Open collector output is active (low) when V
OUT
 is more
than 8% below nominal output. Circuit has 3% hysteresis.
 
3
GND
Circuit ground.
 
4
V
P
 
N-channel Gate Drive Supply Voltage: User supplied voltage for driving the
gate of the external MOSFET.
 
5
V
DD
 
Supply Voltage (Input): Supply voltage connection. Connect sense resis-
tor (R
S
) to V
DD
 if current limiting used. Connect supply bypass capacitor to
ground near device.
 
6
G
Gate (Output): Drives the gate of the external MOSFET.
 
7
D
Drain and Current Limit (Input): Connect to external MOSFET drain and ex-
ternal sense resistor (current limit), or connect to V
DD
and external MOSFET
drain (no current limit).
 
8 (3.3V, 5V)
S
Source (Input): Top of internal resistive divider chain. Connect directly to the
load for best load regulation.
 
8 (adjustable)
EA
Error Amplier (Input): Connect to external resistive divider.
Pin Description MIC5157, MIC5158
 
Pin Number
Pin Name
Pin Function
 
1 (MIC5157)
5V
 
5V Conguration (Input): Connect to S (source) pin for 5V output.
 
1 (MIC5158)
EA
Error Amplier (Input): Connect to external resistive divider to obtain adjust-
able output.
 
2 (MIC5157)
3.3V
3.3V Conguration (Input): Connect to S (source) pin for 3.3V output.
 
2 (MIC5158)
5V FB
5V Feedback (Input): Connect to EA for xed 5V output.
 
3
FLAG
Output Voltage Flag (Output): Open collector is active (low) when V
OUT
 is 8%
or more below its nominal value.
 
4
GND
Circuit ground.
 
5
V
CP
 
Voltage Tripler Output [Filter Capacitor]. Connect a 1 to 10礔 capacitor to ground.
 
6
C2
Charge Pump Capacitor 2: Second stage of internal voltage tripler. Connect a
0.1礔 capacitor from C2+ to C2.
 
7
C2+
Charge Pump Capacitor 2: See C2 pin 6.
 
8
C1+
Charge Pump Capacitor 1: First stage of internal voltage tripler. Connect a
0.1礔 capacitor from C1+ to C1.
 
9
C1
Charge Pump Capacitor 1: See C1+ pin 8.
 
10
V
DD
 
Supply Voltage (Input): Supply voltage connection. Connect sense resis-
tor (R
S
) to V
DD
 if current limiting used. Connect supply bypass capacitor to
ground near device.
 
11
G
Gate (Output): Connect to External MOSFET gate.
 
12
D
Drain and Current Limit (Input): Connect to external MOSFET drain and ex-
ternal sense resistor (current limit), or connect to V
DD
and external MOSFET
drain (no current limit).
 
13 (MIC5157)
S
Source and 3.3V/5V Conguration: Top of internal resistor chain. Connect to
source of external MOSFET for 3.3V, 5V, and 12V operation. Also see 3.3V
and 5V pin descriptions.
 
13 (MIC5158)
S
Source (Input): Top of internal resistor chain. Connect to top of external resis-
tive divider and source of external MOSFET.
 
14
EN
 
Enable (Input): TTL high enables regulator; TTL low shuts down regulator.
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