ADP5037 Analog Devices Technical Data Sheet / Manual
Summary
The ADP5037 is a compact, high-performance power management unit featuring two 800mA buck regulators and two 300mA LDOs in a small 4mm x 4mm package. This solution delivers stable, energy-efficient power for complex portable electronics, including medical devices and industrial instrumentation. The accompanying manual provides comprehensive technical details necessary for design engineers, covering operating modes (PWM/PSM), component selection, and detailed specifications to ensure optimal performance in space-constrained applications.
Page 1 Text Content
Dual 3 MHz, 800 m A Buck Regulators with Two 300 m A LDOs
Data Sheet ADP5037
FEATURES 4 mm LFCSP to meet demanding performance and board space requirements.
Main input voltage range: 2.3 V to 5.5 V
Two 800 m A buck regulators and two 300 m A LDOs The high switching frequency of the buck regulators enables tiny 24-lead, 4 mm × 4 mm LFCSP package multilayer external components and minimizes the board space. Regulator accuracy: ±3% When the MODE pin is set high, the buck regulators operate in
Factory programmable or external adjustable VOUTx forced PWM mode. When the MODE pin is set low and the 3 MHz buck operation with forced PWM and auto PWM/PSM load is above a predefined threshold, the buck regulators modes operate in PWM mode. When the load current falls below a BUCK1/BUCK2: output voltage range from 0.8 V to 3.8 V predefined threshold, the regulator operates in power save LDO1/LDO2: output voltage range from 0.8 V to 4.75 V mode (PSM), improving the light-load efficiency. LDO1/LDO2: low input supply voltage from 1.7 V to 5.5 V
The two bucks operate out of phase to reduce the input capaci-
LDO1/LDO2: high PSRR and low output noise
tor requirement. The low quiescent current, low dropout voltage, APPLICATIONS and wide input voltage range of the ADP5037 LDOs extend the battery life of portable devices. The ADP5037 LDOs maintain
Power for processors, ASICS, FPGAs, and RF chipsets
power supply rejection greater than 60 d B for frequencies as
Portable instrumentation and medical devices
high as 10 k Hz while operating with a low headroom voltage.
Space constrained devices
Regulators in the ADP5037 are activated though dedicated
GENERAL DESCRIPTION
enable pins. The default output voltages can be externally set in
The ADP5037 combines two high performance buck regulators
the adjustable version or factory programmable to a wide range
and two low dropout (LDO) regulators in a small, 24-lead 4 mm ×
of preset values in the fixed voltage version.
TYPICAL APPLICATION CIRCUIT AVIN
HOUSEKEEPING
CAVIN
VOUT1
VIN1 SW1
2.3V TO VOUT1 AT
FB1 R1
4.7µF BUCK1
PGND1 10µF
ON EN1
OFF EN1 MODE
PSM/PWM
VOUT2
VIN2 MODE
C2 SW2 VOUT2 AT
BUCK2 FB2 R3
EN2 R4
EN2 PGND2 10µF
EN3 VOUT3 VOUT3 AT
EN3 LDO1 300m A
VIN3 FB3 R5
1.7V TO (ANALOG)
1µF ON EN4
VOUT4 VOUT4 AT
LDO2 300m A
FB4 R7
(DIGITAL) C8
ADP5037
Figure 1.
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rights of third parties that may result from its use. Specifications subject to change without notice. No
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Page Summary Contents For ADP5037 Analog Devices Technical Data Sheet / Manual
Manual Details
| Brand | Analog Devices |
|---|---|
| Pages | 28 |
| File Size | 619.00 KB |
| Published | June 15, 2026 |
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Frequently Asked Questions
What is the operating voltage range for this regulator?
The main input voltage range is from 2.3 V to 5.5 V.
How do I ensure low power consumption during light loads?
When the load current drops below a predefined threshold, the buck regulators enter Power Save Mode (PSM), improving efficiency.
What type of package does the ADP5037 use?
It uses a 24-lead, 4 mm × 4 mm LFCSP package for minimal board space.
Is this chip suitable for battery-powered medical devices?
Yes, its low quiescent current and wide input range extend battery life in portable and medical instruments.