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MP9218 Datasheet(PDF) 7 Page - Monolithic Power Systems

Part No. MP9218
Description  High Performance Regulated Charge Pump
Download  8 Pages
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Maker  MPS [Monolithic Power Systems]
Homepage  http://www.monolithicpower.com
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MP9218 Datasheet(HTML) 7 Page - Monolithic Power Systems

   
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MP9218–HIGH PERFORMANCE REGULATED CHARGE PUMP
MP9218 Rev. 1.0
www.MonolithicPower.com
7
10/20/2014
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2014 MPS. All Rights Reserved.
OPERATION
OUT
GND
IN
CP
CN
EN
Figure 1— Functional Block Diagram
The MP9218 uses a switched capacitor charge
pump to boost an input voltage to a regulated
output voltage. Regulation is achieved by
sensing the charge pump output voltage
through an internal resistor divider network. A
switched doubling circuit is enabled when the
divided output drops below a preset trip point
controlled by an internal comparator.
The switching signal, which drives the charge
pump, is created by an integrated oscillator
within the control circuit block. The fixed charge
pump switching frequency is approximately
1.35MHz.
The MP9218 has complete output short-circuit
and thermal protection to safeguard the device
under extreme operating conditions. An internal
thermal
protection
circuit
senses
die
temperature and will shut down the device if the
internal
junction
temperature
exceeds
approximately 145°C. The charge pump will
remain disabled until the fault condition is
relieved.


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