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onsemi NCP1530DM25R2G
- Part No.:
- NCP1530DM25R2G
- Manufacturer:
- onsemi
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
NCP1530DM25R2G.pdf
- Description:
- IC REG BUCK 2.5V 600MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,314
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Product details
Overview
NCP1530DM25R2G from onsemi is a 600 mA non-synchronous step-down (buck) DC-DC converter with PWM/PFM dual-mode operation, fixed 600 kHz switching frequency (extendable to 1.2 MHz via external sync), and factory-trimmed 2.5 V output voltage. It integrates a P-channel MOSFET, supports 1-cell Li-ion or 2+ cell alkaline/NiCd/NiMH input (2.8–5.0 V), and delivers high efficiency up to 92% at 300 mA under 4.3 VIN/3.3 VOUT - used in portable digital still cameras for regulated core power.
For engineers reviewing the NCP1530DM25R2G datasheet, pinout, applications, or equivalent options, key selection criteria include its 2.5 V output accuracy (±3%), 47 µA quiescent current, 0.5 µA shutdown current, 100% duty cycle capability, and Micro8 package compatibility with space-constrained handheld designs.
Technical Context
The NCP1530DM25R2G employs peak-current-mode PWM control with internal compensation, enabling stable regulation using only ceramic input/output capacitors. Its mode selection is determined by the SYN pin: grounded or floating enables automatic PWM/PFM transition (PFM threshold = 83 mA at VIN = 4.5 V), while connection to VIN forces constant-frequency PWM.
It features an internally trimmed 1.20 V ±1.5% reference (accessible at VREF pin), programmable soft-start via external capacitor on SS pin (50 nA charge current), and built-in protections including undervoltage lockout (2.0 V typ), thermal shutdown (145°C), and cycle-by-cycle current limit (1.5 A).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±3% - factory-programmed, stable across 0–85°C ambient and 150 mA load. |
| Max Output Current | 600 mA - supported with internal P-FET (RDS(ON) = 0.3 Ω typ) at VIN = 5.0 V, VOUT = 3.0 V. |
| Quiescent Current | 47 µA typ - enables ultra-low-power operation in battery-powered standby states. |
| Shutdown Current | 0.5 µA typ - achieved by pulling EN low; reduces system leakage during sleep modes. |
| Oscillator Frequency | 600 kHz ±20% - fixed internal frequency; synchronizable to 600–1200 kHz external clock via SYN pin. |
| Input Voltage Range | 2.8 V to 5.0 V - compatible with single Li-ion (fully charged) and multi-cell alkaline/NiMH sources. |
| Reference Voltage | 1.20 V ±1.5% - high-accuracy internal bandgap reference accessible at VREF pin for external monitoring or feedback tuning. |
Pinout & Package
The NCP1530DM25R2G is housed in a space-saving, low-profile Micro8™ package (Case 846A), with 8 pins arranged in a single-row surface-mount configuration. Pin numbering follows standard top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Unregulated input supply | Accepts 2.8–5.0 V; requires local 22 µF ceramic bypass capacitor adjacent to pin for EMI suppression. |
| SYN (Pin 2) | Oscillator synchronization & mode control | GND/floating → auto PWM/PFM; VIN → forced PWM; external 600–1200 kHz clock → synchronized PWM. |
| SS (Pin 3) | Soft-start timing control | Sources 50 nA to external capacitor; sets startup ramp time (e.g., 100 pF → ~5 ms); floating defaults to 500 µs internal soft-start. |
| GND (Pin 4) | Power ground reference | Common return for VIN, LX, and internal circuitry; must be connected to star ground point per layout guidelines. |
| EN (Pin 5) | Active-high enable | Pull ≥1.5 V to enable; pull ≤1.2 V to enter shutdown (0.5 µA IQ); internally pulled to VIN. |
| VOUT (Pin 6) | Feedback sense node | Connects directly to output rail; internal error amplifier compares against 1.20 V reference to regulate 2.5 V output. |
| VREF (Pin 7) | External voltage reference access | Provides 1.20 V ±1.5% reference; supports up to 5 mA load; decoupling capacitor (1.0 µF) recommended for noise-sensitive apps. |
| LX (Pin 8) | Switch node / P-FET drain | Drives external inductor; switches between VIN and GND; requires careful PCB routing to minimize EMI and ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic PWM/PFM mode switching | Reduces light-load quiescent current from 47 µA to <10 µA equivalent by entering variable-frequency PFM below 83 mA (VIN=4.5 V, VOUT=2.5 V), extending battery life in idle states. |
| 100% duty cycle capability | Allows dropout operation down to VOUT + RDS(ON)·ILOAD, maximizing usable battery voltage range - critical for single-cell Li-ion systems. |
| Externally programmable soft-start | Prevents inrush current and output overshoot via user-selected capacitor on SS pin; eliminates need for external sequencing controllers. |
| Integrated cycle-by-cycle current limit | Protects internal P-FET and external components at 1.5 A peak, enabling robust short-circuit response without external sensing resistors. |
| Thermal shutdown with hysteresis | Shuts down at 145°C junction temperature and re-enables at 130°C, preventing thermal runaway during sustained overload or poor heatsinking. |
Applications
| Digital Still Camera Power Supply | Portable Audio System Core Rail |
|---|---|
Use Scenario: Powers image sensor, ISP, and memory interface in compact DSCs operating from single Li-ion battery (3.0–4.2 V). IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 2.5 V at up to 600 mA with low-noise PWM mode during capture and ultra-low-IQ PFM during preview/idle. Use Value: Enables >10-hour standby via 0.5 µA shutdown current and extends active runtime via 92% peak efficiency at 300 mA. | Use Scenario: Supplies DSP, DAC, and headphone amplifier in battery-powered portable audio players. IC Role / Device Role / Timing Role: Fixed-frequency 600 kHz buck converter providing clean 2.5 V rail; synchronized mode suppresses beat frequencies with audio codec clocks. Use Value: Ceramic-capacitor compatibility eliminates electrolytic bulk caps, reducing board area and improving long-term reliability in consumer devices. |
| Cellular Handset Baseband Core | Handheld Test Equipment Logic Rail |
Use Scenario: Regulates baseband processor core voltage in legacy GSM/EDGE handsets powered by dual alkaline cells (2.4–3.2 V). IC Role / Device Role / Timing Role: Non-synchronous buck IC supporting wide input range and 100% duty cycle to maintain regulation as batteries deplete. Use Value: Undervoltage lockout (2.0 V) prevents brownout-induced crashes; thermal shutdown protects during RF transmit bursts. | Use Scenario: Generates precise 2.5 V logic supply for microcontroller and ADC subsystems in portable multimeters and signal analyzers. IC Role / Device Role / Timing Role: High-accuracy buck regulator with 1.20 V reference accessible externally for calibration and monitoring. Use Value: Reference voltage stability (±1.5%) and low TC (0.03 mV/°C) support metrology-grade accuracy over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | 3-MHz synchronous buck; 600 mA; 2.5 V fixed output; 22 µA IQ; 1.8–6.5 V input. | Higher switching frequency enables smaller inductors but increases EMI sensitivity; no PFM mode. | Choose for space-constrained designs needing smallest passive size; avoid if PFM efficiency at light loads is critical. |
| RT8059NGSP | 1.5-MHz synchronous buck; 600 mA; 2.5 V fixed; 30 µA IQ; 2.5–5.5 V input; integrated MOSFETs. | Higher frequency and synchronous rectification improve light-load efficiency but require tighter layout control. | Prefer for new designs prioritizing BOM count reduction and mid-load efficiency; verify thermal performance under 600 mA continuous load. |
Compared with TPS62231DRYR and RT8059NGSP, the NCP1530DM25R2G offers proven PFM efficiency at ultra-light loads (<10 mA), robust 100% duty cycle operation for aging batteries, and Micro8 package compatibility with legacy layouts - making it optimal for cost-sensitive, battery-life-critical portable equipment.
Availability
NCP1530DM25R2G is available at Aetrix Electronics and suitable for digital still cameras, portable audio systems, cellular handsets, and handheld test equipment requiring stable component supply, long-lifecycle availability, and Pb-free compliance.
Supply support for NCP1530DM25R2G 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
onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power management, analog, and sensor solutions for automotive, industrial, and portable electronics.
The NCP1530DM25R2G belongs to onsemi's NCP1530 family of high-efficiency, low-quiescent-current buck converters designed specifically for battery-powered portable devices demanding extended runtime and reliable regulation across varying input voltages.
FAQ
What is the factory-set output voltage of the NCP1530DM25R2G?
The NCP1530DM25R2G is factory-programmed for a nominal output voltage of 2.5 V, with a tolerance of ±3% (2.425 V to 2.575 V) across temperature and load conditions. This fixed output is achieved via internal resistor divider trimming and does not require external feedback components.
How does the NCP1530DM25R2G switch between PWM and PFM modes?
The NCP1530DM25R2G automatically transitions between PWM and PFM based on load current and SYN pin state. With SYN grounded or floating, it operates in PWM mode above ~83 mA (at VIN = 4.5 V) and switches to PFM below that threshold to reduce quiescent current. Pulling SYN to VIN forces constant-frequency PWM regardless of load.
What is the purpose of the VREF pin on the NCP1530DM25R2G?
Pin 7 (VREF) provides access to the internal 1.20 V ±1.5% precision voltage reference. It can be decoupled with a 1.0 µF capacitor for noise-sensitive applications and supports up to 5 mA of external load current - enabling use in external monitoring circuits, calibration paths, or auxiliary reference supplies within the same system.
Can the NCP1530DM25R2G operate with a 100% duty cycle, and why is this important?
Yes, the NCP1530DM25R2G supports 100% duty cycle operation, allowing the output to track the input voltage minus small losses (RDS(ON) × ILOAD). This is essential for maintaining regulation as battery voltage declines - especially in single-cell Li-ion systems where input may drop to 2.8 V while still requiring 2.5 V output.
What protection features are integrated into the NCP1530DM25R2G?
The NCP1530DM25R2G includes undervoltage lockout (2.0 V typ), thermal shutdown (145°C activation, 15°C hysteresis), cycle-by-cycle current limiting (1.5 A peak), and output overvoltage protection (6–12% above nominal). These functions operate autonomously without external components, enhancing system reliability in portable and battery-operated environments.
NCP1530DM25R2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 600kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
NCP1530DM25R2G FAQ
1.How can I place an order for NCP1530DM25R2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1530DM25R2G 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 NCP1530DM25R2G reliable?
The price and inventory of NCP1530DM25R2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1530DM25R2G is usually 5 days.
3.What payment methods are accepted for NCP1530DM25R2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1530DM25R2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1530DM25R2G?
NCP1530DM25R2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1530DM25R2G 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 NCP1530DM25R2G?
For technical support, including NCP1530DM25R2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1530DM25R2G requirements.
6.How does Aetrix verify that NCP1530DM25R2G is sourced from the original manufacturer or authorized distributors?
All NCP1530DM25R2G 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 NCP1530DM25R2G meets industry standards.
7.What is the process for return or replacement of NCP1530DM25R2G?
All NCP1530DM25R2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP1530DM25R2G, 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 NCP1530DM25R2G part is unused and in its original packaging.
Return procedure for NCP1530DM25R2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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