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ADPL21504 Datasheet(PDF) 1 Page - Analog Devices |
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ADPL21504 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 16 page  Data Sheet ADPL21504 Micropower Step-Up DC/DC Converter in a ThinSOT Package Rev. 0 DOCUMENT FEEDBACK One Analog Wa y, Wilmington, MA 01887 - 2356, U.S.A. T el: 781.329.4700 TECHNICAL SUPPORT © 202 5 Analog Devices, Inc. All rights reserved. FEATURES Low Quiescent Current: 20µA in Active Mode <2µA in Shutdown Mode Operates with a VIN as Low as 1.2V Low VCESAT Switch: 270mV at 300mA Uses Small Surface Mount Components High Output Voltage: Up to 30V Low Profile (1mm) ThinSOTTM Package APPLICATIONS Portable Electronics Battery Backup Digital Cameras Organic Light Emitting Diode (OLED) Power Medical Diagnostic Equipment GENERAL DESCRIPTION The ADPL21504 is a micropower step-up DC/DC converter in a 5-lead, low-profile (1mm) ThinSOT package. The ADPL21504 is designed for higher power systems with a 350mA current limit and an input voltage range of 1.2V to 15V. The ADPL21504 features a quiescent current of only 20µA at no load, which further reduces to 2µA (max) in shutdown. A current-limited, fixed off-time control scheme conserves operating current, resulting in high efficiency over a broad range of load currents. The 32V switch enables the generation of high-voltage outputs up to 30V in a simple boost topology, eliminating the need for costly transformers. The ADPL21504’s low off-time of 400ns permits the use of tiny, low-profile inductors and capacitors, minimizing footprint and cost in space-conscious portable applications. TYPICAL APPLICATION Figure 1. 1-Cell Li-Ion to 20V Converter for LCD Bias Figure 2. Efficiency vs. Load Current FB ADPL21504 VIN 2.5V TO 4.2V L1 10µH D1 SHDN R2 130kΩ R1 2MΩ C2 1µF VOUT 20V, 12mA L1: WÜRTH 74438335100 C1: MURATA GRM21BR71C475KE51L D1: ONSEMI MBR0530 C2: MURATA GRM31CR72A105KA01K GND C1 4.7µF VIN SW LOAD CURRENT (mA) 0.1 0.3 1 3 10 30 90 80 70 60 50 40 30 20 10 0 VIN = 2.5V VIN = 3.3V VIN = 4.2V |
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