MAX38903A

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


Please check latest availability status for a specific part variant.

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 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 TDFN (3mm x 3mm) package, while the MAX38903C/D are offered in a 9-bump wafer-level package (WLP), 0.4mm pitch (1.4mm x 1.4mm).

MAX38903A, MAX38903B, MAX38903C, MAX38903D: Simplified Functional Diagram MAX38903A, MAX38903B, MAX38903C, MAX38903D: Simplified Functional Diagram Enlarge+

Key Features

  • 1.7V to 5.5V Input Voltage Range
  • 0.6V to 5.3V Programmable Output Voltage
  • 7µVRMS Output Noise, 10Hz to 100kHz
  • 1200µA Operating Supply Current
  • 70dB PSRR at 10kHz
  • 1A Maximum Output Current
  • ±1% DC Accuracy Over Load, Line, and Temperature
  • 100mV Maximum Dropout at 1A Load
  • <1μA Shutdown Supply Current
  • Stable with 4µF(min) Output Capacitance
  • Programmable Soft-Start Rate
  • Overcurrent and Overtemperature Protection
  • Output-to-Input Reverse-Current Protection
  • Power-OK Output
  • 1.4mm x 1.4mm, 3 x 3 Bump, 0.4mm Pitch WLP or 3mm x 3mm 10-pin TDFN Package

Applications/Uses

  • Audio Systems
  • Communication Circuitry
  • High-Resolution Data-Acquisition Systems
Part NumberRegulatorsVIN
(V)
VIN
(V)
Preset VOUT
(V)
Adj. VOUT
(V)
Adj. VOUT
(V)
VDROPOUT @Rated ILOAD
(V)
Rated ILOAD
(mA)
Rated ILOAD
(mA)
ICC
(µA)
Output Voltage Noise
(µV RMS)
Ref. BypassLow Batt./ Pwr. Fail OutPOK/Reset Thresh.
(V)
WatchdogReverse Batt. Protect.Oper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxminmaxtypmaxtypnomSee Notes
MAX38903A NEW!21.75.5
1.2
1.5
1.8
2.5
3
3.1
3.3
4
0.65.30.051000100060012YesNo-NoNo-40 to +125
See Data Sheet
-
MAX38903B NEW!1-Vout-9%
THIN QFN (Dual)/10
$1.12 @1k
MAX38903C NEW!2--
See Data Sheet
-
MAX38903D NEW!2
0.75 to 3.0
0.7V to 5.3V in 50 mV steps
-
See Data Sheet
-
See All Linear Regulators (144)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX38903EVKIT#TDFN: Evaluation Kit for the MAX38903A/MAX38903B

Quality and Environmental Data

Request Reliability Report for: MAX38903A 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

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