MP1527
2A, 1.3MHz
Step-Up Converter
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
MP1527DR
MP1527DM
EV0034
Package
QFN16 (4x4)
TSSOP14
Temperature
-40° to +85°C
-40° to +85°C
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
V
IN
= 2.6V to 25V
IN
FAULT
ON/OFF
FAULT
E
N
SS
B
P
SW
V
OUT
= 3.3V to 25V
FB
COMP
SGND
PGND
MP1527 Rev 1.8_8/31/05
Monolithic Power Systems, Inc.
1
MPS [ MONOLITHIC POWER SYSTEMS ]
