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参数资料
| 型号： | MP28372DS-LF |
| 厂商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A DUAL SWITCHING CONTROLLER, 1400 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | LEAD FREE, SOIC-16 |
| 文件页数： | 8/12页 |
| 文件大小： | 268K |
| 代理商： | MP28372DS-LF |
MP28372 — DUAL 1.5A, 23V, 1.4MHz STEP-DOWN CONVERTER
MP28372 Rev. 1.4
www.MonolithicPower.com
5
12/10/2007
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2007 MPS. All Rights Reserved.
TM
PIN FUNCTIONS (SOIC16)
Pin #
Name
Description
1
SSA
Soft-Start Control for Channel A. 9k output resistance from the pin. Set RC time constant
with external capacitor for soft start ramp time. Ramp Time = 2.2 x 9k x C.
2
BSA
High-Side Driver Boost Pin. Connect a 10nF capacitor from this pin to SWA.
3
INA
Supply Voltage Channel A. The MP28372 operates from a +4.75V to +23V unregulated input.
Input Ceramic Capacitors should be close to this pin.
4
SWA
Switch Channel A. This connects the inductor to either INA through M1A or to PGA through M2A.
5
GNDA
Ground A.
6
FBB
Feedback Voltage for Channel B. This pin is the feedback voltage. The output voltage is ratio scaled
through a voltage divider, and the center point of the divider is connected to this pin. The voltage is
compared to the on board 0.92V reference.
7
COMPB
Compensation Channel B. This is the output of the transconductance error amplifier. A series
RC is placed on this pin for proper control loop compensation. Please refer to more in the
datasheet.
8
ENB
Enable/UVLO Channel B. A voltage greater than 2.62V enables operation. Leave ENB
unconnected for automatic startup. An Under Voltage Lockout (UVLO) function can be
implemented by the addition of a resistor divider from VIN to GND. For complete low current
shutdown the ENB pin voltage needs to be less than 700mV.
9
SSB
Soft-Start Control for Channel B. 9k output resistance from the pin. Set RC time constant
with external capacitor for soft start ramp time. Ramp Time = 2.2x9kxC.
10
BSB
High-Side Driver Boost Pin. Connect a 10nF capacitor from this pin to SWB.
11
INB
Supply Voltage Channel B. The MP28372 operates from a +4.75V to +23V unregulated input.
Input Ceramic Capacitors should be close to this pin.
12
SWB
Switch Channel B. This connects the inductor to either INB through M1B or to PGB through M2B.
13
GNDB
Ground B.
14
FBA
Feedback Voltage for Channel A. This pin is the feedback voltage. The output voltage is ratio scaled
through a voltage divider, and the center point of the divider is connected to this pin. The voltage is
compared to the on board 0.92V reference.
15
COMPA
Compensation Channel A. This is the output of the transconductance error amplifier. A series
RC is placed on this pin for proper control loop compensation. Please refer to more in the
datasheet.
16
ENA
Enable/UVLO Channel A. A voltage greater than 2.62V enables operation. Leave ENA
unconnected for automatic startup. An Under Voltage Lockout (UVLO) function can be
implemented by the addition of a resistor divider from VIN to GND. For complete low current
shutdown the ENA pin voltage needs to be less than 700mV.
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