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ADP2140ACPZ1218R7

更新时间： 2024-11-26 02:53:03
品牌 Logo 应用领域
亚德诺 - ADI 开关光电二极管
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32页 2811K
描述
3 MHz, 600 mA, Low Quiescent Current Buck with 300 mA LDO Regulator

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ADP2140ACPZ1218R7 数据手册

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3 MHz, 600 mA, Low Quiescent Current  
Buck with 300 mA LDO Regulator  
Data Sheet  
ADP2140  
FEATURES  
TYPICAL APPLICATION CIRCUITS  
V
= 3.6V  
Input voltage range: 2.3 V to 5.5 V  
LDO input (VIN2) 1.65 V to 5.5 V  
Buck output voltage range: 1.0 V to 3.3 V  
LDO output voltage range: 0.8 V to 3.3 V  
Buck output current: 600 mA  
IN1  
+
C
10µF  
IN  
ADP2140  
100kΩ  
PG  
10  
9
1
2
3
4
5
VIN1  
PGND  
1µH  
V
= 1.2V  
OUT  
PG  
SW  
8
+
C
EN1  
EN2  
EN1  
AGND  
FB  
OUT  
10µF  
LDO output current: 300 mA  
7
EN2  
V
= 1.8V  
OUT2  
6
LDO quiescent current: 22 μA with zero load  
Buck quiescent current: 20 μA in PSM mode  
Low shutdown current: <0.3 μA  
Low LDO dropout 110 mV @ 300 mA load  
High LDO PSRR  
VOUT2  
VIN2  
+
C
OUT2  
1µF  
Figure 1. ADP2140 with LDO Connected to VIN1  
V
= 3.3V  
IN1  
65 dB @ 10 kHz at VOUT2 = 1.2 V  
+
C
IN  
10µF  
ADP2140  
55 dB @ 100 kHz at VOUT2 = 1.2 V  
Low noise LDO: 40 μV rms at VOUT2 = 1.2 V  
Initial accuracy: 1ꢀ  
Current-limit and thermal overload protection  
Power-good indicator  
100kΩ  
PG  
10  
9
1
2
3
4
5
VIN1  
PGND  
1µH  
V
= 1.8V  
OUT  
PG  
SW  
8
+
C
EN1  
EN2  
EN1  
AGND  
FB  
OUT  
10µF  
7
EN2  
V
= 1.2V  
OUT2  
6
VOUT2  
VIN2  
+
Optional enable sequencing  
10-lead 0.75 mm × 3 mm × 3 mm LFCSP package  
C
OUT2  
1µF  
Figure 2. ADP2140 with LDO Connected to Buck Output  
APPLICATIONS  
Mobile phones  
Personal media players  
Digital camera and audio devices  
Portable and battery-powered equipment  
GENERAL DESCRIPTION  
The ADP2140 includes a high efficiency, low quiescent 600 mA  
stepdown dc-to-dc converter and a 300 mA LDO packaged in a  
small 10-lead 3 mm × 3 mm LFCSP. The total solution requires  
only four tiny external components.  
ADP2140 includes a power-good pin, soft start, and internal  
compensation. Numerous power sequencing options are user-  
selectable through two enable inputs. In autosequencing mode,  
the highest voltage output enables on the rising edge of EN1.  
During logic controlled shutdown, the input disconnects from  
the output and draws less than 300 nA from the input source.  
Other key features include: undervoltage lockout to prevent deep  
battery discharge, soft start to prevent input current overshoot  
at startup, and both short-circuit protection and thermal overload  
protection circuits to prevent damage in adverse conditions.  
The buck regulator uses a proprietary high speed current-  
mode, constant frequency, pulse-width modulation (PWM)  
control scheme for excellent stability and transient response. To  
ensure the longest battery life in portable applications, the  
ADP2140 has a power saving variable frequency mode to reduce  
switching frequency under light loads.  
When the ADP2140 is used with two 0603 capacitors, one 0402  
capacitor, one 0402 resistor, and one 0805 chip inductor, the  
total solution size is approximately 90 mm2 resulting in the smallest  
footprint solution to meet a variety of portable applications.  
The LDO is a low quiescent current, low dropout linear regulator  
designed to operate in a split supply mode with VIN2 as low as  
1.65 V. The low input voltage minimum allows the LDO to be  
powered from the output of the buck regulator increasing effi-  
ciency and reducing power dissipation. The ADP2140 runs from  
input voltages of 2.3 V to 5.5 V allowing single Li+/Li− polymer  
cell, multiple alkaline/NiMH cell, PCMCIA, and other standard  
power sources.  
Rev. B  
Document Feedback  
Information furnished by Analog Devices is believed to be accurate and reliable. However, no  
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other  
rights of third parties that may result from its use. Specifications subject to change without notice. No  
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.  
Trademarks and registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700 ©2010–2019 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
 
 
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ADP2140ACPZ1218R7 替代型号

型号 品牌 替代类型 描述 数据表
ADP2140ACPZ1233R7 ADI

完全替代

 3 MHz, 600 mA, Low Quiescent Current Buck with 300 mA LDO Regulator
ADP2140ACPZ1812R7 ADI

类似代替

 3 MHz, 600 mA, Low Quiescent Current Buck with 300 mA LDO Regulator

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