AAT2510 Datasheet, PDF (1/19 Pages) Advanced Analogic Technologies – Dual 400mA, 1MHz Step-Down DC-DC Converter

DATA SHEET
AAT2510
Dual 400mA, 1MHz Step-Down DC/DC Converter
General Description
The AAT2510 is a member of Skyworks' Total Power
Management IC (TPMIC™) product family. It is com-
prised of two 1MHz step-down converters designed to
minimize external component size and cost. The input
voltage ranges from 2.7V to 5.5V. The output voltage
ranges from 0.6V to the maximum applied input voltage
and is either fixed or externally adjustable.
Peak current mode control with internal compensation
provides a stable converter with low ESR ceramic output
capacitors for extremely low output ripple. Each channel
has a low 25μA quiescent operating current, which is
critical for maintaining high efficiency at light load.
For maximum battery life, each converter’s high-side
P-channel MOSFET conducts continuously when the
input voltage approaches dropout (100% duty cycle
operation).
Both regulators have independent input and enable
inputs.
The AAT2510 is available in a thermally-enhanced 12-pin
TDFN33 package, and is rated over the -40°C to +85°C
temperature range.
Features
• Up to 96% Efficiency
• 25μA Quiescent Current Per Channel
• V_IN Range: 2.7V to 5.5V
• Fixed V_OUT Range: 0.6V to V_IN
• Adjustable V_OUT Range: 0.6V to 2.5V
• Output Current: 400mA
• Low R_DS(ON) 0.4 Integrated Power Switches
• Low Drop Out 100% Duty Cycle
• 1.0MHz Switching Frequency
• Shutdown Current <1μA
• Current Mode Operation
• Internal Reference Soft Start
• Short-Circuit Protection
• Over-Temperature Protection
• 3mm x 3mm, < 1mm high
• TDFN33-12 Package
• -40°C to +85°C Temperature Range
Applications
• Cellular Phones
• Digital Cameras
• Handheld Instruments
• Microprocessor/DSP Core/IO Power
• PDAs and Handheld Computers
• Portable Media Players
Typical Application
VIN = 2.7 - 5.5V
C3
10μF
2.5V at 400mA _L1
4.7μH
C1
4.7μF
U1
AAT2510
12
VIN1
9
VIN2
1
EN1
4
EN2
11
LX1
8
LX2
2
FB1
5
FB2
3
6
SGND1 SGND2
10
GND1
7
GND2
C8
0.1μF
1.8V at 400mA
L2
4.7μH
C2
4.7μF
L1,L2 Sumida CDRH3D16-4R7 C1,C2 Murata GRM219R61A475KE19
C3 Murata GRM21BR60J106KE19
AAT2510 Efficiency
100
95
90
85 ^2.5V
80
75
70
65
60
0.1
1.8V
1
VIN = 3.3V with unloaded output disabled
10
100
1000
Load Current (mA)
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
202020B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • March 19, 2013
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