參數(shù)資料
型號(hào): MIC2172BN
廠商: MICREL INC
元件分類: 穩(wěn)壓器
英文描述: RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS
中文描述: 3.5 A SWITCHING REGULATOR, 115 kHz SWITCHING FREQ-MAX, PDIP8
封裝: PLASTIC, DIP-8
文件頁數(shù): 14/20頁
文件大?。?/td> 906K
代理商: MIC2172BN
Micrel
MIC2172/3172
April 2006
3
M9999-041806
(408) 955-1690
Pin Description
Pin Number
Pin Name
Pin Function
1
S GND
Signal Ground: Internal analog circuit ground. Connect directly to the input filter
capacitor for proper operation (see applications info). Keep separate from power
grounds.
2
COMP
Frequency Compensation: Output of transconductance type error amplifier.
Primary function is for loop stabilization. Can also be used for output voltage
soft-start and current limit tailoring.
3
FB
Feedback: Inverting input of error amplifier. Connect to external resistive divider
to set power supply output voltage.
4 (MIC2172)
SYNC
Synchronization/Frequency Adjust: Capacitively coupled input signal greater
than device’s free running frequency (up to 135kHz) will lock device’s oscillator
on falling edge. Oscillator frequency can be trimmed up to 135kHz by adding a
resistor to ground. If unused, pin must float (no connection).
4 (MIC3172)
EN
Enable: Apply TTL high or connect to VIN to enable the regulator. Apply TTL low
or connect to ground to disable the regulator. Device draws only leakage current
(<1A) when disabled.
5
VIN
Supply Voltage: 3.0V to 40V
6
P GND 2
Power Ground #2: One of two NPN power switch emitters with 0.3
current
sense resistor in series. Required. Connect to external inductor or input voltage
ground depending on circuit topology.
7
VSW
Power Switch Collector: Collector of NPN switch. Connect to external inductor or
input voltage depending on circuit topology.
8
P GND 1
Power Ground #1: One of two NPN power switch emitters with 0.3
current
sense resistor in series. Optional. For maximum power capability connect to P
GND 2. Floating pin reduces current limit by a factor of two.
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MIC2172YM-TR 制造商:Micrel Inc 功能描述:
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