GENERAL DESCRIPTION
The ADP5033 combines two high performance buck regulators and two low dropout regulators (LDO) in a tiny, 16-ball, 2 mm × 2 mm WLCSP to meet demanding performance and board space requirements.
The two bucks operate out of phase to reduce the input capacitor requirement and noise.
The low quiescent current, low dropout voltage, and wide input voltage range of the ADP5033 LDO extend the battery life of portable devices. The ADP5033 LDOs maintain power supply rejection greater than 60 dB for frequencies as high as 10 kHz while operating with a low headroom voltage.
The regulators in the ADP5033 are activated by the ENA and ENB pins. The specific channels controlled by ENA and ENB are set by factory programming. A high voltage level applied to the enable pins activates the regulators. The default output voltages are factory programmable and can be set to a wide range of options.

FEATURES
  Main input voltage range: 2.3 V to 5.5 V
  Two 800 mA buck regulators and two 300 mA LDOs
  Tiny, 16-ball, 2 mm × 2 mm WLCSP package
  Regulator accuracy: ±3%
  Factory programmable VOUTx
  3 MHz buck operation with forced PWM and auto PWM/PSM modes
  BUCK1/BUCK2: output voltage range from 0.8 V to 3.3 V
  LDO1/LDO2: output voltage range from 0.8 V to 3.3V
  LDO1/LDO2: low input supply voltage from 1.7 V to 5.5 V
  LDO1/LDO2: high PSRR and low output noise

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