MP1527
2A, 1.3MHz
Step-Up Converter
MP1527 Rev 1.8_8/31/05
Monolithic Power Systems, Inc. 1
Monolithic Power Systems
General Description
The MP1527 is a 2A, fixed frequency step-up
converter in a tiny 16 lead QFN package. The
high 1.3MHz switching frequency allows for
smaller external components producing a
compact solution for medium-to-high current
step-up, flyback, and SEPIC applications.
The MP1527 regulates the output voltage up
to 25V at efficiency as high as 93%. Soft-start,
timer-latch fault circuitry, cycle-by-cycle current
limiting, and input undervoltage lockout
prevent overstressing or damage to external
circuitry at startup and output short-circuit
conditions. Fixed frequency operation eases
control of noise making the MP1527 optimal
for noise sensitive applications such as mobile
handsets and wireless LAN PC cards.
Current-mode regulation and external
compensation components allow the MP1527
control loop to be optimized over wide variety
of input voltage, output voltage and load
current conditions.
The MP1527 is offered in a tiny 4mm x 4mm
16 lead QFN and 14 lead TSSOP packages.
Features
2A Peak Current Limit
Internal 150mΩ Power Switch
V
IN
Range of 2.6V to 25V
>93% Efficiency
Zero Current Shutdown Mode
Under Voltage Lockout Protection
Timer-Latch Fault Detection
Soft Start Operation
Thermal Shutdown
Tiny 4mm x 4mm 16 pin QFN Package
Evaluation Board Available
Applications
SOHO Routers, PCMCIA Cards, Mini PCI
Handheld Computers, PDAs
Cell Phones, Digital and Video Cameras
Small LCD Display
Ordering Information
Part Number Package Temperature
MP1527DR QFN16 (4x4)
-40° to +85°C
MP1527DM TSSOP14
-40° to +85°C
EV0034
MP1527DR Evaluation Board
∗ For Tape & Reel, add suffix –Z (e.g. MP1527DR–Z)
For Lead Free, add suffix –LF (e.g. MP1527DR–LF–Z)
Figure 1: Typical Application Circuit
ON/OFF
FA ULT
V
IN
= 2.6V to 25V
V
OUT
= 3.3V to 25V
SS
EN
FAULT
IN
BP
SGND
SW
FB
PGND
COMP
