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Nexperia USA Inc. RP111L121D5-TR
- Part No.:
- RP111L121D5-TR
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 6-XFDFN Exposed Pad
- Datasheet:
-
RP111L121D5-TR.pdf
- Description:
- RP111L - Low Voltage Good Load T
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
RP111L121D5-TR from Ricoh Electronics is a CMOS-based low-dropout linear regulator with 500mA output current, 1.25V fixed output voltage, and DFN1212-6 package. It features ±0.8% output accuracy (≥1.8V), 75dB ripple rejection at 1kHz, 0.23V dropout at 500mA/2.5V, and built-in auto-discharge function. Designed for battery-powered portable equipment requiring stable low-noise power under fast load transients.
For engineers reviewing the RP111L121D5-TR datasheet, RP111L121D5-TR pinout, RP111L121D5-TR application, or RP111L121D5-TR equivalent, key selection criteria include dropout voltage at 500mA, thermal shutdown threshold (165°C), inrush current limit (400mA/180µs), and compatibility with 1.0µF ceramic output capacitors.
Technical Context
The RP111L121D5-TR implements a CMOS pass transistor architecture with integrated feedback loop compensation optimized for ceramic capacitor stability. Its auto-discharge function (enabled via "D" suffix) actively pulls VOUT to GND when CE is low, eliminating residual voltage on downstream circuitry.
It delivers high transient response via internal error amplifier bandwidth optimization and low-output-impedance design, achieving ±45mV load transient undershoot/overshoot (1mA ↔ 250mA, COUT=1µF, tr=tf=0.5µs). Input transient response remains within ±1.5mV across 1.4–5.25V input range at 30mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.25V ±0.8% (guaranteed over −40°C to +85°C) |
| Max Output Current | 500mA continuous - supports single-core microcontrollers and RF front-ends |
| Dropout Voltage | 0.23V typ. at IOUT=500mA, VOUT=2.5V - enables operation down to VIN=1.48V for 1.25V rail |
| 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 |
| Thermal Shutdown | 165°C junction temperature - protects against sustained overload or poor PCB heatsinking |
| Output Noise | 25µVrms (BW=10Hz–100kHz) - suitable for analog sensor and ADC reference supplies |
Pinout & Package
RP111L121D5-TR uses the DFN1212-6 (1.2mm × 1.2mm, 0.4mm height) package with exposed thermal pad connected to GND. The 6-pin configuration supports compact layout and efficient heat dissipation in space-constrained portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VOUT | Regulated output node | Delivers 1.25V to load; requires ≥1.0µF ceramic capacitor placed adjacent to pin |
| 2 VFB | Feedback reference input | Internally tied to 1.25V reference; shorted to VOUT for fixed-output operation |
| 3 GND | Power and signal ground | Primary return path; connects to exposed thermal pad for thermal management |
| 4 CE | Chip enable (active-high) | Logic-level control (VIH=1.0V min); enables auto-discharge when pulled low |
| 5 NC | No connection | Not internally bonded - must remain unconnected per design |
| 6 VDD | Input supply pin | Accepts 1.4V–5.25V; requires local 1.0µF ceramic decoupling capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Actively discharges VOUT to GND when CE = L, preventing floating bias in powered-off states |
| Low-noise regulation | 25µVrms output noise (10Hz–100kHz) - avoids interference in precision analog circuits |
| Fast load transient response | ±45mV max deviation for 1mA ↔ 250mA step (COUT=1µF) - maintains system stability during burst-mode operation |
| Thermal & current protection | Integrated foldback current limit (50mA short-circuit), thermal shutdown (165°C), and inrush current clamp (400mA/180µs) |
| Ceramic capacitor compatible | Stable with ≥1.0µF X5R/X7R ceramics - eliminates need for higher-ESR tantalum or electrolytic caps |
Applications
| Portable Medical Sensors | Wearable Fitness Trackers |
|---|---|
Use Scenario: Powering optical heart-rate sensors and low-power ADCs in disposable patch monitors. IC Role / Device Role / Timing Role: Primary 1.25V analog supply rail with ultra-low noise and fast transient recovery during LED pulse activation. Use Value: 25µVrms noise ensures <1 LSB error in 16-bit biomedical ADCs; ±45mV transient swing prevents sensor saturation during photodiode current surges. | Use Scenario: Regulating power to BLE SoC and MEMS accelerometers in wrist-worn devices. IC Role / Device Role / Timing Role: Always-on LDO supplying real-time clock and sensor hub during sleep mode; enabled/disabled via host MCU GPIO. Use Value: 0.1µA standby current extends battery life beyond 14 days; auto-discharge prevents leakage into disabled peripherals upon shutdown. |
| Industrial Handheld Scanners | Smart Home Doorbell Cameras |
Use Scenario: Providing clean 1.25V bias to laser diode drivers and image sensor interfaces in battery-operated barcode scanners. IC Role / Device Role / Timing Role: High-PSRR LDO isolating sensitive imaging circuitry from noisy motor and RF sections. Use Value: 75dB ripple rejection attenuates 1MHz switching noise from boost converter by >560×, eliminating image banding artifacts. | Use Scenario: Powering CMOS image sensor and audio codec in lithium-ion–powered video doorbells. IC Role / Device Role / Timing Role: Main system LDO delivering regulated 1.25V during motion-triggered wake-up bursts. Use Value: 0.23V dropout allows operation down to 1.48V input - extends usable battery range by ~12% versus higher-VDO alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP2204-1.25TRG1 | Higher dropout (0.35V @ 500mA), no auto-discharge, SOT-23-5 only | Lacks active discharge; less suitable for systems requiring rapid VOUT decay on shutdown | Select if board space permits larger package and auto-discharge is unnecessary |
| Torex XC6210B122MR-G | Lower IQ (35µA), same 1.25V output, but no thermal shutdown or inrush limit | Missing critical protection features for high-reliability industrial use | Prefer for ultra-low-power IoT nodes where thermal risk is mitigated externally |
Compared with AP2204-1.25TRG1 and XC6210B122MR-G, RP111L121D5-TR uniquely combines auto-discharge, thermal shutdown, and 75dB PSRR in a 1.2mm² DFN - making it optimal for compact, safety-critical portable electronics where controlled power sequencing and noise immunity are mandatory.
Availability
RP111L121D5-TR is available at Aetrix Electronics and suitable for portable medical sensors, wearable fitness trackers, industrial handheld scanners, and smart home doorbell cameras requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for RP111L121D5-TR 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 specifically for battery-powered portable electronics demanding ultra-low quiescent current, fast transient response, and robust protection - targeting applications where size, efficiency, and reliability are co-constrained.
FAQ
What is the purpose of the NC pin on RP111L121D5-TR?
Pin 5 is a no-connect terminal with no internal bond wire or circuit connection. It must remain unconnected in PCB layout to avoid unintended coupling or mechanical stress. This pin exists solely for mechanical symmetry and package standardization within the DFN1212-6 footprint.
Can RP111L121D5-TR operate with a 1.0µF ceramic output capacitor?
Yes - the device is explicitly characterized and guaranteed stable with ≥1.0µF X5R/X7R ceramic capacitors (e.g., Murata GRM155B31A105KE15). Tantalum or aluminum electrolytic capacitors are not recommended due to ESR-related instability risks confirmed in application note EA-241-190523.
How does the auto-discharge function behave during CE deactivation?
When CE is driven low, an internal NMOS switch connects VOUT to GND, discharging external capacitance at a rate determined by load and capacitor value. Typical discharge time for 10µF is <5ms. This prevents residual voltage from powering downstream logic or causing latch-up in mixed-voltage systems.
Is thermal derating required for RP111L121D5-TR in a 40mm×40mm double-sided PCB?
Yes - at ambient temperatures above 25°C, power dissipation must be reduced per θJA=167°C/W. For example, at TA=60°C and Tjmax=125°C, maximum allowable PD drops to 390mW. Full derating curves and land pattern guidelines are provided in section 13 of the datasheet (NO.EA-241-190523).
RP111L121D5-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- RP111x
- Package/Case:
- 6-XFDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 1.25V
- 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:
- DFN1212-6
RP111L121D5-TR FAQ
1.How can I place an order for RP111L121D5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for RP111L121D5-TR 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 RP111L121D5-TR reliable?
The price and inventory of RP111L121D5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RP111L121D5-TR is usually 5 days.
3.What payment methods are accepted for RP111L121D5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RP111L121D5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RP111L121D5-TR?
RP111L121D5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RP111L121D5-TR 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 RP111L121D5-TR?
For technical support, including RP111L121D5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RP111L121D5-TR requirements.
6.How does Aetrix verify that RP111L121D5-TR is sourced from the original manufacturer or authorized distributors?
All RP111L121D5-TR 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 RP111L121D5-TR meets industry standards.
7.What is the process for return or replacement of RP111L121D5-TR?
All RP111L121D5-TR units undergo pre-shipment inspection (PSI). If there is an issue with RP111L121D5-TR, 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 RP111L121D5-TR part is unused and in its original packaging.
Return procedure for RP111L121D5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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