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参数资料
| 型号： | MIC5156-3.3BM TR |
| 厂商： | Micrel Inc |
| 文件页数： | 3/13页 |
| 文件大小： | 271K |
| 描述： | IC REG CTRLR SGL 3.3V 8-SOIC |
| 标准包装： | 2,500 |
| 类型： | 正，固定式 |
| 输出数： | 1 |
| 输出电压： | 3.3V |
| 电流 - 电源： | 2.7mA |
| 输入电压： | 3 V ~ 36 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
| 其它名称： | MIC5156-3.3BMTR MIC5156-3.3BMTR-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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