MAX38903B
1.7V–5.5VIN, 1A Low Noise LDO Linear Regulators in TDFN and WLP
The MAX38903A/B/C/D are a Low-Noise Linear Regulators that Delivers up to 1A of Out-Put Current with Only 7uVRMS
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Overview
Features and Benefits
- Delivers Flexible Operating Range
- 1.7V to 5.5V Input Voltage Range
- 0.6V to 5.0V Programmable Output Voltage
- 1A Maximum Output Current
- 100mV Maximum Dropout at 1A Load
- <1µA Shutdown Supply Current
- Reduces Noise and Improves Accuracy
- ±1% DC Accuracy Over Load, Line, and Temperature
- 7µVRMS Output Noise, 10Hz to 100kHz
- 1200µA Operating Supply Current
- 70dB PSRR at 10kHz
- Enables Ease-of-Use and Robust Protection
- Active Discharge of 800Ω at OUT
- Stable with 4µF(min) Output Capacitance
- Programmable Soft-Start Rate
- Overcurrent and Overtemperature Protection
- Output-to-Input Reverse Current Protection
- Power-OK Output
- Reduces Size, Improves Reliability
- 3mm x 3mm, 10-pin TDFN Package and 1.4mm x 1.4mm, 3 x 3 Bump, 0.4mm Pitch WLP
- -40°C to 125°C Operating Temperature
Product Details
The MAX38903A/B/C/D are a family of low-noise linear regulators that deliver up to 1A of output current with only 7µVRMS of output noise from 10Hz to 100kHz.
These regulators maintain ±1% output accuracy over a wide input voltage range, requiring only 100mV of input-to-output headroom at full load. The 1200µA no-load supply current is independent of dropout voltage. The MAX38903A/B/C/D has an 800Ω active discharge feature to quickly discharge output capacitors.
The MAX38903A has nine pin-selectable output voltages 1.2V, 1.5V, 1.8V, 2.5V, 3.0V, 3.1V, 3.3V, 4.0V, and 5V. The MAX38903B/C output voltage can be adjusted to a value in the range of 0.6V to 5.0V using two external resistors.
The MAX38903B also includes an active-high POK signal for trouble-free load startup.The MAX38903D has factory-preset output voltages over the range of 0.7V to 5V in 50mV steps. All versions include a programmable output soft-start rate, output over-current and thermal overload protection.
The MAX38903A/B are offered in a 10-pin, 3mm x 3mm TDFN package, while the MAX38903C/D are offered in a 9-bump, 0.4mm pitch, 1.4mm x 1.4mm wafer-level package (WLP).
Applications
- Communication Systems, Test Equipment, Medical Equipment
- High-End Audio Systems
- High-Resolution Data Acquisition Systems
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Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (2)
Documentation & Resources
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MAX38903B_C Reliability Data10/10/2022PDF170K
Reference Designs (1)
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