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Nexperia USA Inc. RP111N131D5-TR-FE
- Part No.:
- RP111N131D5-TR-FE
- Manufacturer:
- Nexperia USA Inc.
- Package:
- SC-74A, SOT-753
- Datasheet:
-
RP111N131D5-TR-FE.pdf
- Description:
- RP111N - Low Voltage Good Load T
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
RP111N131D5-TR-FE from Ricoh Electronics is a CMOS-based low-dropout linear regulator with 500mA output current, 1.3V fixed output voltage, and SOT-23-5 package. It features ±0.8% output voltage accuracy (≥1.8V), 75dB ripple rejection at 1kHz, 0.23V dropout at 500mA/2.5V, and built-in thermal shutdown, foldback protection, and inrush current limiting. It powers portable communication equipment requiring stable low-noise bias under battery-varying input.
For engineers reviewing the RP111N131D5-TR-FE datasheet, RP111N131D5-TR-FE pinout, RP111N131D5-TR-FE application, or RP111N131D5-TR-FE equivalent, key selection criteria include dropout voltage at 500mA load, ±0.8% output accuracy over −40°C to +85°C, thermal shutdown at 165°C, CE pin logic ("H" active), and compatibility with 1.0µF ceramic output capacitors.
Technical Context
The RP111N131D5-TR-FE implements a CMOS pass transistor architecture with internal 0.46Ω on-resistance (at VOUT=2.8V), enabling low dropout and high PSRR. Its feedback loop uses a precision bandgap reference and VFB pin for adjustable configurations, though this variant is fixed-output with VOUT tied internally to VFB.
It integrates three protection circuits: foldback current limiting (typ. 50mA short-circuit current), thermal shutdown (165°C trip, 100°C release), and inrush current limit (400mA peak for 180µs). The CE pin enables full shutdown with 0.1µA standby current, supporting power sequencing in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.3V ±0.8% (guaranteed ≥1.8V; actual spec applies per mark code J13) |
| Max Output Current | 500mA continuous - supports single-core microcontrollers and RF front-ends |
| Dropout Voltage | 0.31V max at IOUT=500mA, VOUT=1.3V - enables operation down to VIN=1.61V |
| Ripple Rejection | 75dB at 1kHz - suppresses switching noise from upstream DC/DC converters |
| Supply Current | 80µA typ. - minimizes quiescent loss in always-on subsystems |
| Standby Current | 0.1µA typ. - enables ultra-low-power deep-sleep modes via CE control |
| Thermal Shutdown | 165°C junction temperature - prevents catastrophic failure during overload or poor PCB heatsinking |
Pinout & Package
SOT-23-5 package with exposed pad not electrically connected; standard JEDEC MO-178 footprint. Pin 1 = VDD (input), Pin 2 = GND, Pin 3 = CE (active-high enable), Pin 4 = VFB (feedback; internally tied to VOUT for fixed version), Pin 5 = VOUT (regulated output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Input supply connection | Accepts 1.4V–5.25V; must be decoupled with ≥1.0µF ceramic capacitor near pin |
| 2 (GND) | Power ground reference | Low-impedance return path for load and internal circuitry; critical for transient stability |
| 3 (CE) | Chip enable control | Logic "H" (≥1.0V) enables regulation; "L" (≤0.4V) disables output and reduces current to 0.1µA |
| 4 (VFB) | Feedback node | Internally connected to VOUT for fixed 1.3V operation; not user-accessible in this variant |
| 5 (VOUT) | Regulated output | Delivers 1.3V ±0.8% to load; requires ≥1.0µF ceramic capacitor to GND for stability |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 0.31V max at 500mA ensures operation with <200mV headroom above output voltage |
| High PSRR | 75dB @1kHz enables clean LDO output even when powered from noisy buck converters |
| Fast load transient response | ±45mV undershoot/overshoot (COUT=1µF) during 1mA↔250mA step improves digital core stability |
| Low-noise operation | 20×VOUT µVrms (BW=10Hz–100kHz) - 26µVrms at 1.3V - suitable for ADC references |
| Robust protection suite | Thermal shutdown (165°C), foldback current limit (50mA), and inrush control (400mA/180µs) prevent damage during fault conditions |
Applications
| Portable Communication Devices | Digital Camera Power Management |
|---|---|
Use Scenario: Powering baseband processors and RF transceivers in Bluetooth headsets and LTE modules where input voltage varies from 2.5V to 4.2V as battery discharges. IC Role / Device Role / Timing Role: Primary 1.3V bias rail for low-power microcontrollers and analog front-ends. Use Value: Maintains ±0.8% output accuracy across −40°C to +85°C and 1mA–500mA load, ensuring reliable digital logic margins and ADC reference stability. | Use Scenario: Supplying image sensor interface circuitry and ISP cores in compact digital cameras with tight PCB space constraints. IC Role / Device Role / Timing Role: Low-noise 1.3V LDO delivering clean power to high-speed serial interfaces (e.g., MIPI CSI-2) and timing-sensitive pixel readout blocks. Use Value: 75dB PSRR at 1kHz attenuates switching noise from main PMIC, reducing image sensor pattern noise and improving SNR. |
| Battery-Powered IoT Sensors | Home Appliance Control Boards |
Use Scenario: Providing regulated 1.3V to ultra-low-power MCUs (e.g., ARM Cortex-M0+) and BLE SoCs in coin-cell–powered environmental sensors. IC Role / Device Role / Timing Role: Always-on voltage source enabling wake-on-event functionality with sub-µA standby draw. Use Value: 0.1µA standby current during CE deactivation extends 2032 coin-cell life beyond 5 years in periodic-sampling applications. | Use Scenario: Powering touch controller ICs and display drivers on smart appliance UI boards operating from 3.3V or 5V system rails. IC Role / Device Role / Timing Role: Secondary low-noise LDO isolating sensitive UI circuitry from noisy motor and relay switching transients. Use Value: Thermal shutdown (165°C) and foldback protection ensure safe operation during accidental output short-circuits caused by connector mating faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B132MR-G | Same 1.3V output, 500mA rating, SOT-23-5, but 1.0µA standby current vs. 0.1µA | Lacks inrush current limiting; less robust against startup surges into large capacitive loads | Prefer RP111N131D5-TR-FE where fast turn-on into 10µF+ loads is required |
| Rohm BD3985FVM-13E2 | 1.3V, 500mA, SOT-23-5, but higher dropout (0.45V typ. at 500mA) and lower PSRR (65dB @1kHz) | Higher thermal dissipation at full load; reduced noise filtering capability | RP111N131D5-TR-FE preferred for battery-powered apps needing minimal VIN headroom and high PSRR |
Compared with XC6210B132MR-G and BD3985FVM-13E2, RP111N131D5-TR-FE delivers superior transient response (±45mV vs. ±65mV), lower dropout (0.31V vs. ≥0.45V), and 10× lower standby current - making it optimal for energy-constrained, fast-switching embedded systems.
Availability
RP111N131D5-TR-FE is available at Aetrix Electronics and suitable for portable communication devices, digital camera power management, battery-powered IoT sensors, and home appliance control boards requiring stable component supply with guaranteed long-term availability.
Supply support for RP111N131D5-TR-FE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Ricoh Electronics is a Japanese semiconductor manufacturer specializing in power management ICs, including LDOs, DC/DC converters, and battery management solutions for consumer, industrial, and automotive markets.
The RP111x series was designed for space-constrained, battery-operated applications demanding high accuracy, low noise, and excellent transient response - particularly in portable electronics where input voltage varies widely and load steps are frequent.
FAQ
What is the minimum input voltage required for RP111N131D5-TR-FE to regulate 1.3V at 500mA?
The maximum dropout voltage at 500mA and 1.3V output is 0.31V (per datasheet Table "Dropout Voltage" for VOUT=1.3V). Therefore, minimum input voltage is 1.3V + 0.31V = 1.61V. Operation below this will cause dropout and unregulated output.
Can RP111N131D5-TR-FE be used with tantalum output capacitors?
No - the datasheet explicitly warns that tantalum capacitors may cause instability due to inappropriate ESR. Only ceramic capacitors ≥1.0µF are recommended for COUT. Using tantalum risks oscillation, especially under dynamic load conditions.
Does the VFB pin require external components for the RP111N131D5-TR-FE fixed-output variant?
No. The RP111N131D5-TR-FE is a fixed-output version (marked J13); its VFB pin is internally connected to VOUT. External resistors are unnecessary and must not be attached, as they would disrupt regulation and potentially damage the feedback network.
How does the inrush current limit function during startup?
At power-on, the RP111N131D5-TR-FE limits peak inrush current to 400mA for 180µs, preventing voltage droop on the input rail and avoiding false triggering of upstream overcurrent protection. This allows safe charging of typical 1–10µF output capacitances without auxiliary soft-start circuitry.
RP111N131D5-TR-FE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- RP111x
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 1.35V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.53V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 125 µA
- Current - Supply (Max):
- -
- PSRR:
- 75dB (10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
RP111N131D5-TR-FE FAQ
1.How can I place an order for RP111N131D5-TR-FE through Aetrix?
Please submit a Request for Quotation (RFQ) for RP111N131D5-TR-FE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for RP111N131D5-TR-FE reliable?
The price and inventory of RP111N131D5-TR-FE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RP111N131D5-TR-FE is usually 5 days.
3.What payment methods are accepted for RP111N131D5-TR-FE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RP111N131D5-TR-FE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RP111N131D5-TR-FE?
RP111N131D5-TR-FE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RP111N131D5-TR-FE order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for RP111N131D5-TR-FE?
For technical support, including RP111N131D5-TR-FE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RP111N131D5-TR-FE requirements.
6.How does Aetrix verify that RP111N131D5-TR-FE is sourced from the original manufacturer or authorized distributors?
All RP111N131D5-TR-FE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that RP111N131D5-TR-FE meets industry standards.
7.What is the process for return or replacement of RP111N131D5-TR-FE?
All RP111N131D5-TR-FE units undergo pre-shipment inspection (PSI). If there is an issue with RP111N131D5-TR-FE, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The RP111N131D5-TR-FE part is unused and in its original packaging.
Return procedure for RP111N131D5-TR-FE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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