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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Key Features
Applications/Uses
| VIN (V) (min) | 1.7 |
| VIN (V) (max) | 5.5 |
| Adj. VOUT (V) (min) | 0.6 |
| Adj. VOUT (V) (max) | 5.3 |
| Rated ILOAD (mA) | 1000 |
| # Regulators | 1 |
| VDROPOUT @Rated ILOAD (V) (typ) | 0.05 |
| ICC (µA) (max) | 600 |
| Output Voltage Noise (µV RMS) (typ) | 12 |
| Ref. Bypass | Yes |
| Low Batt./ Pwr. Fail Out | No |
| POK/Reset Thresh. (V) (nom) | Vout-9% |
| Watchdog | No |
| Reverse Batt. Protect. | No |
| Oper. Temp. (°C) | -40 to +125 |
| Package/Pins | TDFN-CU/10 |
| Budgetary Price (See Notes) | 1.5 |
Simplified Block Diagram
Technical Docs
| Data Sheet | 1.7V–5.5VIN, 1A Low Noise LDO Linear Regulators in TDFN and WLP | Mar 04, 2022 |
Support & Training
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Parameters
| VIN (V) (min) | 1.7 |
| VIN (V) (max) | 5.5 |
| Adj. VOUT (V) (min) | 0.6 |
| Adj. VOUT (V) (max) | 5.3 |
| Rated ILOAD (mA) | 1000 |
| # Regulators | 1 |
| VDROPOUT @Rated ILOAD (V) (typ) | 0.05 |
| ICC (µA) (max) | 600 |
| Output Voltage Noise (µV RMS) (typ) | 12 |
| Ref. Bypass | Yes |
| Low Batt./ Pwr. Fail Out | No |
| POK/Reset Thresh. (V) (nom) | Vout-9% |
| Watchdog | No |
| Reverse Batt. Protect. | No |
| Oper. Temp. (°C) | -40 to +125 |
| Package/Pins | TDFN-CU/10 |
| Budgetary Price (See Notes) | 1.5 |
Key Features
- 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
Applications/Uses
- Communication Systems, Test Equipment, Medical Equipment
- High-End Audio Systems
- High-Resolution Data Acquisition Systems
Description
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).
Technical Docs
| Data Sheet | 1.7V–5.5VIN, 1A Low Noise LDO Linear Regulators in TDFN and WLP | Mar 04, 2022 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.
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