Datasheet Analog Devices ADP5034AREZ-1
Dual 3 MHz, 1200mA Buck Regulator with Two 300 mA LDOs
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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 Dual 3 MHz, 1200 mA Buck Regulators with Two 300 mA LDOs ADP5034
regulators operate in PWM mode when the load is above a predefined threshold. When the load current falls below a predefined threshold, the regulator operates in power save mode (PSM), improving the light load efficiency. Table 1. Family Models
Model ADP5023 ADP5024 ADP5034 ADP5037 ADP5033 Channels 2 Buck,1 LDO 2 Buck,1 LDO 2 Buck,2 LDOs 2 Buck,2 LDOs 2 Buck,2 LDOs with 2 EN pins Maximum Current 800 mA, 300 mA 1.2 A, 300 mA 1.2 A, 300 mA 800 mA, 300 mA 800 mA, 300 mA Package LFCSP (CP-24-10) LFCSP (CP-24-10) LFCSP (CP-24-10), TSSOP (RE-28-1) LFCSP (CP-24-10) WLCSP (CB-16-8) APPLICATIONS
Power for processors, ASICS, FPGAs, and RF chipsets Portable instrumentation and medical devices Space constrained devices GENERAL DESCRIPTION
The ADP5034 combines two high performance buck regulators and two low dropout (LDO) regulators. It is available in either a 24-lead 4 mm × 4 mm LFCSP or a 28-lead TSSOP package. The high switching frequency of the buck regulators enables tiny multilayer external components and minimizes the board space. When the MODE pin is set to high, the buck regulators operate in forced PWM mode. When the MODE pin is set to low, the buck
AVIN CAVIN 0.1µF 2.3V TO 5.5V VIN1 C1 4.7µF ON OFF EN1 EN1 BUCK1 The two bucks operate out of phase to reduce the input capacitor 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 through dedicated enable pins. The default output voltages can be externally set in the adjustable version, or factory programmable to a wide range of preset values in the fixed voltage version. TYPICAL APPLICATION CIRCUIT
HOUSEKEEPING VOUT1 SW1 FB1 PGND1 MODE MODE VIN2 C2 4.7µF EN2 EN3 1.7V TO 5.5V VIN3 C3 1µF ON OFF VIN4 C4 1µF EN4 EN4 LDO2 (DIGITAL) VOUT4 FB4 R7 R8 C8 1µF
09703-001 L1 1µH R1 R2 ...
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/BUC...
ADP5034AREZ1, ADP5034AREZ 1