MAX8952 Datasheet, PDF (1/31 Pages) Maxim Integrated Products – 2.5A Step-Down Regulator with Remote Sense in 2mm x 2mm WLP

19-5318; Rev 1; 6/11
2.5A Step-Down Regulator
with Remote Sense in 2mm x 2mm WLP
General Description
The MAX8952 high-efficiency DC-to-DC step-down
switching regulator delivers up to 2.5A of output current.
The device operates from a 2.5V to 5.5V input voltage
range, supporting commonly-used battery technologies
in handsets. The output voltage is I²C programmable
from 0.77V to 1.40V. Remote sense ensures precise DC
regulation at the load. Total output error is less than
±1.5% over load, line, and temperature.
The IC operates at a 3.25MHz fixed frequency. The high
operating frequency minimizes the size of external com-
ponents. The switching frequency of the converter can be
synchronized to the master clock of the application. When
synchronizing to an external clock, the IC measures the
frequency of the external clock to ensure that the clock is
stable before changing the switching frequency to the
external clock frequency.
An on-board DAC allows adjustment of the output volt-
age in 10mV steps. The output voltage can be pro-
grammed directly through the I²C interface, or by
preloading a set of on-board registers and using the
two VID logic signals to select the appropriate register.
Other features include internal soft-start control circuitry
to reduce inrush current, output overvoltage, overcur-
rent, and overtemperature protection.
Applications
Cell Phones and Smartphones
PDAs and MP3 Players
Tablet PCs
Bump Configuration
+ ^IN1
A1
SNS+
B1
SNS-
C1
V_DD
D1
TOP VIEW
(BUMPS ON BOTTOM)
AGND
VID1
A2
A3
EN
LX
B2
B3
VID0
PGND
C2
C3
SDA
SCL
D2
D3
IN2
A4
LX
B4
PGND
C4
SYNC
D4
Features
o 2.5A Guaranteed Output Current
o I²C Programmable V_OUT (770mV to 1.40V in 10mV
Steps)
o Initial Accuracy ±0.5% at 1.40V Output
o ±1.5% Output Accuracy Over Load, Line, and
Temperature (DCR ≤ 38.5mΩ)
o Power-Save Mode Increases Light Load Efficiency
o Fixed 3.25MHz PWM Switching Frequency
o Small 1.0µH Inductor
o Synchronizes to 13MHz, 19.2MHz, or 26MHz
System Clock When Available
o Overvoltage and Overcurrent Protection
o Operates from 2.5V to 5.5V Input Supply
o Thermal Shutdown Protection
o On-Chip FET and Synchronous Rectifier
o 400kHz I²C Interface
o < 1µA Shutdown Current
o 16-Bump, 2mm x 2mm WLP Package
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX8952EWE+T -40°C to +85°C
16-Bump WLP
(0.5mm pitch)
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
Typical Operating Circuit
1.8V TO
3.6V
2.5V TO
5.5V
0.1μF
11Ω
2.2μF
0.1μF
MAX8952 _IN2
VDD
SCL
SDA
IN1
SYNC
EN
VID0
LX
PGND
SNS+
VID1
SNS-
AGND
1μH
10μF
2.5V TO
5.5V
0.1μF
10μF 10μF
0.1μF
VOUT
(0.77V TO
1.40V)
CPU
WLP 0.5mm PITCH
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.