My Inquiry
My Account
Nexperia USA Inc. RP510L331H-TR
- Part No.:
- RP510L331H-TR
- Manufacturer:
- Nexperia USA Inc.
- Package:
- -
- Datasheet:
-
RP510L331H-TR.pdf
- Description:
- IC REG 4A
- Quantity:
- Payment:
- Shipping:
Inventory:2,913
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
RP510L331H-TR from Ricoh Electronics is a 4 A synchronous step-down DC/DC converter operating from 2.5 V to 5.5 V input, delivering fixed 3.3 V output with ±1% accuracy at VSET ≥ 1.2 V. It integrates power-good signaling, adjustable soft-start, foldback overcurrent protection, and operates across −40°C to +85°C. Designed for SoC power rails in compact portable and embedded systems.
For engineers reviewing the RP510L331H-TR datasheet, RP510L331H-TR pinout, RP510L331H-TR application, or RP510L331H-TR equivalent, key selection criteria include its DFN3030-12 package, 2.3 MHz switching frequency, 0.04 Ω internal Pch/Nch MOSFET on-resistance, 55 ns minimum on-time, and support for power sequencing via PG and TSS pins.
Technical Context
The RP510L331H-TR implements a forced PWM control architecture with synchronous rectification, enabling high efficiency across light-to-heavy loads without pulse-skipping or mode transitions. Its integrated 2.3 MHz oscillator supports compact external components (1 µH inductor, 22 µF ×2 ceramic output capacitors) while maintaining stable regulation under dynamic load steps.
It features dual ground domains (AGND and PGND), separate PVIN/AVIN inputs with recommended RC filtering, and a dedicated LX switching node capable of sustaining 6.5 A peak current. The foldback overcurrent protection automatically recovers after fault removal-unlike latch-type variants-making it suitable for transient-overload-prone applications like FPGA core rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 4 A continuous - supports high-current SoC and processor core rails without external MOSFETs. |
| Input Voltage Range | 2.5 V to 5.5 V - compatible with single-cell Li-ion, USB PD, and 3.3 V/5 V system rails. |
| Output Voltage | Fixed 3.3 V ±1% (VSET ≥ 1.2 V) - eliminates external feedback resistors and improves accuracy vs. adjustable types. |
| Switching Frequency | Typ. 2.3 MHz - enables use of small 1 µH inductors and reduces EMI filter size. |
| Internal FET RDS(on) | Pch/Nch typ. 0.04 Ω at VIN = 3.6 V - minimizes conduction loss and thermal rise at full load. |
| Soft-start Time | Adjustable from 150 µs (TSS open) to 30 ms (0.1 µF to GND) - prevents inrush current and enables controlled power sequencing. |
| Protection Features | Foldback OCP, UVLO (2.2 V typ.), thermal shutdown (165°C), and power-good signaling - ensures safe recovery from short-circuit events. |
| Standby Current | ≤0.01 µA (typ.) - enables ultra-low-power standby modes in battery-powered devices. |
Pinout & Package
RP510L331H-TR is housed in a thermally enhanced DFN3030-12 (3.0 × 3.0 × 0.8 mm) package with an exposed thermal pad that must be soldered to the PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 PVIN | Main input voltage supply | Parallel high-current VIN connections; must be routed directly to input capacitor plane. |
| 3 AVIN | Analog input supply | Filtered VIN input (via 1 Ω / 10 nF LPF) for noise-sensitive internal reference and control circuits. |
| 4 PG | Power-good open-drain output | NMOS output pulled low during fault (UVLO, OVP, UVP, thermal, CE=low); requires 10–100 kΩ pull-up. |
| 5 CE | Chip enable (active-high) | Logic-level enable with 1.0 V threshold; allows precise system-level power sequencing control. |
| 6 TSS | Soft-start timing control | Capacitor-connected node setting soft-start duration; open = 150 µs typ., 0.1 µF = 30 ms typ. |
| 7 VOUT | Fixed 3.3 V output / feedback node | Regulated output pin; also serves as feedback point for internal error amplifier in fixed-output variants. |
| 8 AGND | Analog ground reference | Reference for internal bandgap, error amp, and soft-start circuit; must connect to quiet ground plane. |
| 9, 10 PGND | Power ground return | High-current return path for LX switching node and input/output capacitors; separate from AGND. |
| 11, 12 LX | Switching node | Drives external inductor; handles up to 6.5 A peak current; requires tight layout to minimize ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Foldback overcurrent protection | Self-recovering fault response limiting short-circuit current to ILXLIM/4 (~1.6 A), enabling automatic restart after overload clearance. |
| Power-good (PG) signaling | Open-drain NMOS output with 45 Ω typical on-resistance, providing system-level rail monitoring and sequencing coordination. |
| Adjustable soft-start | Configurable 150 µs–30 ms ramp via external capacitor on TSS pin, eliminating inrush stress on input source and output caps. |
| Dual ground separation (AGND/PGND) | Minimizes noise coupling between sensitive analog control circuitry and high di/dt power paths, improving stability and PSRR. |
| Ultra-low standby current | ≤0.01 µA typical enables multi-week battery shelf life in always-on IoT edge nodes and wearables. |
| Thermal shutdown with hysteresis | 165°C trip / 115°C release threshold prevents thermal runaway while allowing safe recovery without host intervention. |
Applications
| Mobile SoC Power Rail | FPGA Core Supply |
|---|---|
|
Use Scenario: Powering ARM-based application processors (e.g., i.MX, Snapdragon) requiring tightly regulated 3.3 V I/O or auxiliary rails. IC Role / Device Role / Timing Role: Primary step-down regulator with fast transient response and PG signaling for boot sequence validation. Use Value: Fixed 3.3 V output eliminates resistor tolerance errors; 2.3 MHz switching enables <1 mm² solution footprint. |
Use Scenario: Delivering stable 3.3 V to FPGA configuration I/O banks and transceivers in compact networking modules. IC Role / Device Role / Timing Role: High-current POL converter with foldback OCP to survive hot-plug and ESD-induced bus faults. Use Value: Automatic recovery from short-circuit events avoids system reset; PG signal confirms rail readiness before configuration. |
| Industrial Sensor Hub | USB-C Peripheral Power |
|
Use Scenario: Powering multi-sensor nodes (IMU, temperature, humidity) in battery-operated condition monitoring gateways. IC Role / Device Role / Timing Role: Low-quiescent, high-efficiency buck supplying mixed-signal ASICs and RF front-ends. Use Value: ≤0.01 µA standby current extends 2xAA battery life beyond 1 year; DFN3030-12 fits space-constrained PCBs. |
Use Scenario: Regulating 5 V USB-C input down to 3.3 V for USB PD accessories (dongles, docks, adapters). IC Role / Device Role / Timing Role: Input-transient-tolerant DC/DC stage handling variable-source USB-C voltages (4.5–5.5 V). Use Value: 2.5 V–5.5 V input range accommodates USB-C droop; foldback OCP protects against cable/connector shorts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS62933 | 3.3 V fixed, 4 A, 2.25 MHz, but uses QFN-16 (3.5 × 3.5 mm) and lacks foldback OCP (latch-only). | Requires external OCP management for auto-recovery; larger footprint limits ultra-compact designs. | Choose when TI ecosystem integration or higher VIN max (6 V) is prioritized over self-recovering fault behavior. |
| Analog Devices ADP5054-3 | 3.3 V fixed, 4 A, 1.2 MHz, includes integrated LDOs, but no PG pin and only latch-type OCP. | Lacks power-good signaling for sequencing; lower frequency demands larger magnetics and increases solution size. | Prefer when multi-rail integration (buck + LDO) is needed and foldback recovery is not required. |
Compared with TPS62933 and ADP5054-3, RP510L331H-TR uniquely combines foldback OCP, PG signaling, and a 3.0 × 3.0 mm DFN package-enabling smaller, more autonomous power solutions for space- and reliability-critical embedded systems.
Availability
RP510L331H-TR is available at Aetrix Electronics and suitable for mobile SoC power rails, FPGA core supplies, industrial sensor hubs, and USB-C peripheral power requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for RP510L331H-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 highly integrated power management ICs, including DC/DC converters, LDOs, and battery management solutions for consumer, industrial, and automotive markets.
The RP510L series targets high-density, low-voltage point-of-load applications-specifically engineered to replace discrete buck solutions in space-constrained SoC and FPGA power systems with minimal external components.
FAQ
What is the recommended soft-start capacitor value for RP510L331H-TR?
A 0.1 µF capacitor between TSS and GND sets the soft-start time to 30 ms (typical), ideal for controlled power sequencing in multi-rail systems. If faster startup is acceptable, leaving TSS open yields 150 µs (typical). Avoid values below 470 pF, as timing becomes unstable per the datasheet's CSS vs. tSTART curve.
Does RP510L331H-TR require external compensation components?
No-RP510L331H-TR uses internal type-II compensation optimized for 1 µH inductors and 22 µF ×2 ceramic output capacitors. Adding external compensation risks instability; the recommended layout (tight CIN placement, AGND/PGND separation, AVIN RC filter) is sufficient for stable operation across −40°C to +85°C.
How does foldback overcurrent protection differ from latch-type in RP510L331H-TR?
Foldback OCP reduces output current to ~1.6 A (ILXLIM/4) during sustained overload or short-circuit, allowing automatic recovery once the fault clears. In contrast, latch-type variants (e.g., RP510L331G) shut down permanently until CE is toggled or VIN drops below UVLO-requiring host intervention to resume operation.
Can RP510L331H-TR operate with a 2.5 V input and deliver full 4 A at 3.3 V output?
No-per the datasheet, maximum output current is derated at low input voltages. At VIN = 2.5 V, the achievable output current is limited by duty cycle and thermal constraints; full 4 A is specified at VIN ≥ 3.3 V. For 2.5 V input, consult the "Calculation Conditions of LX Pin Maximum Output Current" section to determine actual ILXMAX.
RP510L331H-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
RP510L331H-TR FAQ
1.How can I place an order for RP510L331H-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for RP510L331H-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 RP510L331H-TR reliable?
The price and inventory of RP510L331H-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RP510L331H-TR is usually 5 days.
3.What payment methods are accepted for RP510L331H-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RP510L331H-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RP510L331H-TR?
RP510L331H-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RP510L331H-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 RP510L331H-TR?
For technical support, including RP510L331H-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RP510L331H-TR requirements.
6.How does Aetrix verify that RP510L331H-TR is sourced from the original manufacturer or authorized distributors?
All RP510L331H-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 RP510L331H-TR meets industry standards.
7.What is the process for return or replacement of RP510L331H-TR?
All RP510L331H-TR units undergo pre-shipment inspection (PSI). If there is an issue with RP510L331H-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 RP510L331H-TR part is unused and in its original packaging.
Return procedure for RP510L331H-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RP510L331H-TR Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
