DC/DC Converter. AT1529 Datasheet

AT1529 Converter. Datasheet pdf. Equivalent

AT1529 Datasheet
Recommendation AT1529 Datasheet
Part AT1529
Description 3.2A PWM Buck DC/DC Converter
Feature AT1529; Global Mixed-mode Technology Inc. AT1529 1MHz, All-Ceramic, 3.2A PWM Buck DC/DC Converter Feature.
Manufacture Global Mixed-mode Technology
Datasheet
Download AT1529 Datasheet




Global Mixed-mode Technology AT1529
Global Mixed-mode Technology Inc.
AT1529
1MHz, All-Ceramic, 3.2A PWM Buck DC/DC Converter
Features
„ Ceramic Input and Output Capacitors
„ Efficiency Up to 94%
„ Operate from 2.5V to 6V supply
„ Adjustable Output from 0.8V to VIN
„ Internal Soft-Start
„ Short-Circuit and Thermal-Overload Protection
„ Input Over Voltage Protection
„ RoHS Compliant
Applications
„ ASIC/DSP/µP/FPGA Core and I/O Voltages
„ Set-Top Boxes
„ Cellular Base Stations
„ Networking and Telecommunications
General Description
The AT1529 high-efficiency, DC/DC buck converter
delivers up to 3.2A of output current. The device oper-
ates from an input voltage of 2.5V to 6V and provides
an output voltage from 0.8V to VIN, making the AT1529
ideal for on-board post-regulation applications.
The AT1529 operate at a fixed frequency of 1MHz with
an efficiency of up to 94%. The high operating fre-
quency minimizes the size of external components.
Internal soft-start control circuitry reduces inrush cur-
rent. Short-circuit and thermal-overload protections
improve design reliability.
The AT1529 are available in a space-saving SOP-8
and TDFN3X3-8 package.
Ordering Information
ORDER
NUMBER
MARKING
AT1529F11U
A1529
AT1529RD1U
A1529
Note: F1:SOP-8 (FD) RD: TDFN3X3-8
1: Bonding Code
U: Tape & Reel
TEMP.
RANGE
-40°C to +85°C
-40°C to +85°C
PACKAGE
(Green)
SOP-8 (FD)
TDFN3X3-8
Pin Configuration
Typical Application Circuit
VCC 1
REF 2
GND 3
FB 4
AT1529
Thermal
Pad
8 VIN
7 LX
6 PGND
5 EN
VCC 1
REF
GND
FB
2
3
4
AT1529
Thermal
Pad
8 VIN
7 LX
6 PGND
5 EN
SOP-8 (FD)
TDFN3X3-8
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
VIN
5V
10µF
AT1529
8 VIN
LX 7
10Ω
0.1µF
1 VCC
5 EN
ON OFF PGND
6
4
FB
REF 2
GND 0.1µF
3
VOUT = 0.8V ×
(1+
R1
R2
)
2.2µH
CFB* (option)
R1
R2 50k
16k
VOUT
3.3V
22µF
Ver: 0.3
Nov 29, 2010
TEL: 886-3-5788833
http://www.gmt.com.tw
1



Global Mixed-mode Technology AT1529
Global Mixed-mode Technology Inc.
AT1529
Absolute Maximum Ratings
VIN, VCC, REF to GND . . . . . . . . . . . . . . . -0.3V to +7V
LX to PGND . . . . . . . . . . . . . . . . . . . .-1V to (VIN+1V)
EN, FB to GND. . . . . . . . . . . . . . -0.3V to (VCC + 0.3V)
VIN to VCC . . . . . . . . . . . . . . . . . . . . . . -0.3V to +0.3V
PGND to GND . . . . . . . . . . . . . . . . . . . .-0.3V to +0.3V
Thermal Resistance Junction to Ambient, (θJA) *
SOP-8 (FD) . . . . . . . . . . . . . . . . . . . . . . . . . .108°C/W
TDFN3X3-8 . . . . . . . . . . . . . . . . . . . . . . . . . . .98°C/W
Continuous Power Dissipation (TA = +25°C) *
SOP-8 (FD). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2W
TDFN3X3-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.4W
Thermal Resistance Junction to Case, (θJC)
SOP-8 (FD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12°C/W
TDFN3X3-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . .30°C/W
Operating Temperature Range . . . . . . . .-40°C to 85°C
Maximum Junction Temperature. . . . . . . . . . . . .150°C
Storage Temperature Range. . . . . . . . .-65°C to 165°C
Reflow Temperature (soldeing,10 sec) . . . . . . . .260°C
* Please refer to 1in2 of 1oz PCB Layout Section.
Stress beyond those listed under Absolute Maximum Ratingsmay cause permanent damage to the device.
Electrical Characteristics
(VIN= VCC= 3.3V, PGND = GND, FB in regulation, CREF= 10nF, TA= -40°C to +85°C, unless otherwise noted.
Typical values are at TA= +25°C.)
PARAMETER
IN Voltage Range
Supply Current
VCC Undervoltage Lockout Threshold
REF Voltage
EN Enable Threshold
Output Voltage Range
Output Voltage Line Regulation
Output Voltage Load Regulation
FB Regulation Voltage
(Error Amp Only)
FB Input Bias Current
LX On-Resistance, PMOS
LX On-Resistance, NMOS
LX Current-Limit Threshold
LX Leakage Current
LX Switching Frequency
LX Maximum Duty Cycle
LX Minimum Duty Cycle
Thermal-Shutdown Threshold
Maximum Duty Cycle
Minimum On Time
CONDITION
No switching (EN=VCC)
Shutdown (EN=0V)
VIN = 5V
When LX starts/stops switching
IREF = 0, VIN = 2.5V to 5V
Logic High
Logic Low
When using external feedback resistors to
drive FB
VIN = 3V to 5V
0A<ILOAD<3A
VIN = 2.5V to 5V
VIN = 5V
VIN = 5V
Duty cycle = 100%,
High side
VIN = 2.5V to 5V
Low side
VIN = 5V
VLX = 5V
LX = GND
VIN = 2.5V to 5V
VCOMP = 1.5V, LX = high-Z, VIN = 2.5V to 5V
VCOMP = 1V, VIN = 2.5V to 5V
When LX starts/stops TJ rising
switching
TJ falling
MIN
2.5
---
---
---
---
2
---
0.8
---
---
0.784
-0.1
---
---
4.1
---
---
-10
---
100
---
---
---
100
---
TYP
---
450
20
2.3
0.8
---
---
---
0.08
0.12
0.8
---
116
93
4.8
0
---
---
1
---
15
160
145
---
---
MAX
6
---
---
---
---
---
0.4
VIN
---
---
0.816
0.1
---
---
---
---
10
---
---
---
---
---
---
---
0
UNIT
V
µA
µA
V
V
V
V
V
%/V
%/A
V
µA
mΩ
mΩ
A
µA
MHz
%
%
°C
%
ns
Ver: 0.3
Nov 29, 2010
TEL: 886-3-5788833
http://www.gmt.com.tw
2



Global Mixed-mode Technology AT1529
Global Mixed-mode Technology Inc.
Typical Performance Characteristics
CVIN=10µF, CVOUT=10µF, L=2.2µH, TA=25°C, unless otherwise noted.
AT1529
Switching Waveform
Soft Start Waveform
Soft Start Waveform
Shutdown Waveform
Load Transient Response
Load Transient Response
Ver: 0.3
Nov 29, 2010
TEL: 886-3-5788833
http://www.gmt.com.tw
3







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