Power management unit combines two high performance step-down buck regulators with two low dropout linear regulators. The buck regulators supply up to 1200 mA each and operate at 3 MHz to support compact external components. The LDO regulators supply up to 300 mA each and support low quiescent-current portable applications. The device operates from a 2.5 V to 5.5 V main input range and is housed in a 24-lead 4 mm × 4 mm LFCSP package.
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| Regulator topology | Two buck regulators and two LDO regulators |
| Number of outputs | 4 |
| Buck switching frequency | 3MHz |
| Buck output current | 1200 per regulatormA |
| LDO output current | 300 per regulatormA |
| Main input voltage range | 2.5 to 5.5V |
| Regulator accuracy | ±1.8% |
| LDO PSRR | >60 at 10 kHzdB |
| Output voltage setting | Factory programmable or external adjustable |
| Enable control | Precision enable pins |
| Power-good output | Factory selectable |
| Package | 24-lead 4 mm × 4 mm LFCSP |
| Operating temperature range | -40 to 125°C |
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User guide for evaluating the ADP5134 PMU, featuring two buck regulators and two LDOs with power sequencing, mode options, and adjustable voltage settings.
