ADP5034 Dual 3 MHz, 1200mA Buck Regulator with Two 300 mA LDOs

The ADP5034 combines two high performance buck regulators and two low dropout (LDO) regulators in a small, 24-lead 4 mm × 4 mm LFCSP (QFN) to meet demanding performance and board space requirements.

The high switching frequency of the buck regulators enables tiny multilayer external components and minimizes the board space. When the MODE pin is set high, the buck regulators operate in forced PWM mode. When the MODE pin is set low, the buck regulators operate in PWM mode when the load is around the nominal value. When the load current falls below a predefined threshold, the regulator operates in power save mode (PSM), improving the light-load efficiency.

The two bucks operate out of phase to reduce the input capaci-tor requirement. The low quiescent current, low dropout voltage, and wide input voltage range of the ADP5034 LDOs extend the battery life of portable devices. The ADP5034 LDOs maintain power supply rejection greater than 60 dB for frequencies as high as 10 kHz while operating with a low headroom voltage.

Regulators in the ADP5034 are activated though dedicated enable pins. The default output voltages can be externally set in the adjustable version, or factory programmable in the fixed voltage version, and can be set to a wide range of preset values

APPLICATIONS

Power for processors, ASICS, FPGAs, and RF chipsets
Portable instrumentation and medical devices
Space constrained devices

Features and Benefits

Main input voltage range: 2.3 V to 5.5 V

Two 1200 mA buck regulators and two 300 mA LDOs

24-lead, 4 mm × 4 mm LFCSP or 28-lead TSSOP package

Regulator accuracy: ±1.8%

Factory programmable or external adjustable VOUTx

3 MHz buck operation with forced PWM and auto PWM/PSM modes

BUCK1/BUCK2: output voltage range from 0.8 V to 3.8 V

LDO1/LDO2: output voltage range from 0.8 V to 5.2 V

LDO1/LDO2: input supply voltage from 1.7 V to 5.5 V

LDO1/LDO2: high PSRR and low output noise

Power Management

Design Tools

Data Sheets

Document	note
ADP5034: Dual 3 MHz, 1200 mA Buck Regulators with Two 300 mA LDOs Data Sheet (Rev. E)	PDF 891 kB

Application Notes

Document	note
AN-1311: Complex Power Supply Sequencing Made Easy (Rev. 0)	PDF 139.83 K

User Guides

Document	note
UG-439: Evaluation Board for the ADP5034 TSSOP Micro Power Management Unit (PMU)	PDF 398 kB
UG-271: Evaluation Board for the ADP5023/ADP5024/ADP5034/ADP5037 Micro Power Management Unit (PMU)	PDF 442 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADP5034ACPZ-1-R7 Production	24 ld LFCSP (4x4x.75mm w/2.10mm EP)	REEL 1500	-40 to 125C	0	1.99	Y
ADP5034ACPZ-2-R7 Production	24 ld LFCSP (4x4x.75mm w/2.10mm EP)	REEL 1500	-40 to 125C	0	1.99	Y
ADP5034ACPZ-3-R7 Production	24 ld LFCSP (4x4x.75mm w/2.10mm EP)	REEL 1500	-40 to 125C	0	1.99	Y
ADP5034ACPZ-R2 Production	24 ld LFCSP (4x4x.75mm w/2.10mm EP)	REEL 250	-40 to 125C	2.35	2.35	Y
ADP5034ACPZ-R7 Production	24 ld LFCSP (4x4x.75mm w/2.10mm EP)	REEL 1500	-40 to 125C	0	1.99	Y
ADP5034AREZ Production	28 ld TSSOP-EP(EP=3.5mm)	OTH 50	-40 to 125C	2.39	1.99	Y
ADP5034AREZ-1 Production	28 ld TSSOP-EP(EP=3.5mm)	OTH 50	-40 to 125C	2.39	1.99	Y
ADP5034AREZ-1-R7 Production	28 ld TSSOP-EP(EP=3.5mm)	REEL 1000	-40 to 125C	0	1.99	Y
ADP5034AREZ-R7 Production	28 ld TSSOP-EP(EP=3.5mm)	REEL 1000	-40 to 125C	0	1.99	Y