ADP5043
PRODUCTIONMicro PMU with 800 mA Buck, 300 mA LDO, Supervisory, Watchdog, and Manual Reset
- Part Models
- 1
- 1ku List Price
- Starting From $2.44
Overview
- Input voltage range: 2.3 V to 5.5 V
- One 800 mA buck regulator
- One 300 mA LDO
- 20-lead, 4 mm × 4 mm LFCSP package
- Initial regulator accuracy: ±1%
- Overcurrent and thermal protection
- Soft start
- Undervoltage lockout
- Open-drain processor reset with threshold monitoring
- ±1.5% threshold accuracy over the full temperate range
- Guaranteed reset output valid to VCC = 1 V
- Dual watchdog for secure systems
- Watchdog 1 controls reset
- Watchdog 2 controls reset and regulators power cycle
- Buck regulator key specifications
- Current-mode topology for excellent transient response
- 3 MHz operating frequency
- Uses tiny multilayer inductors and capacitors
- Mode pin selects forced PWM or auto PFM/PSM modes
- 100% duty cycle low dropout mode
- LDO key specifications
- Low VIN from 1.7 V to 5.5 V
- Stable with1 μF ceramic output capacitors
- High PSRR, 60 dB up to 1 kHz/10 kHz
- Low output noise
- Low dropout voltage: 150 mV at 300 mA load
- −40°C to +125°C junction temperature range
The ADP5043 combines one high performance buck regulator and one low dropout (LDO) regulator in a small 20-lead LFCSP to meet demanding performance and board space requirements.
The high switching frequency of the buck regulator enables use of tiny multilayer external components and minimizes board space.
The MODE pin selects the buck’s mode of operation. When set to logic high, the buck regulator operates in forced PWM mode. When the MODE pin is set to logic low, the buck regulator operates 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 low quiescent current, low dropout voltage, and wide input voltage range of the ADP5043 LDO extend the battery life of portable devices. The LDO maintains a power supply rejection of greater than 60 dB for frequencies as high as 10 kHz while operating with a low headroom voltage.
Each regulator is activated by a high level on the respective enable pin. The ADP5043 is available with factory programmable default output voltages and can be set to a wide range of options.
The ADP5043 contains supervisory circuits that monitor power supply voltage levels and code execution integrity in microprocessor-based systems. The ADP5043 also provides power-on reset signals. An on-chip dual watchdog timer can reset the microprocessor or power cycle the system (Watchdog 2) if it fails to strobe within a preset timeout period.
Documentation
Data Sheet 1
Brochure 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| ADP5043ACPZ-1-R7 | 20-Lead LFCSP (4mm x 4mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 6, 2017 - 16_0234 Assembly Transfer to ASE Korea and Test Transfer to STATS ChipPAC Singapore of Select LFCSP Parts. |
||
| ADP5043ACPZ-1-R7 | PRODUCTION | |
|
Aug 6, 2014 - 13_0230 Assembly and Test Transfer of Select 3.5x3.5, 4x3, 4x4, and 5x5mm LFCSP Products to STATS ChipPAC China |
||
| ADP5043ACPZ-1-R7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
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