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onsemi NCP1530DM25R2
- Part No.:
- NCP1530DM25R2
- Manufacturer:
- onsemi
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
NCP1530DM25R2.pdf
- Description:
- IC REG BUCK 2.5V 600MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,676
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Product details
Overview
NCP1530DM25R2 from onsemi is a non-synchronous PWM/PFM step-down DC-DC converter optimized for single-cell Li-ion or multi-cell alkaline/NiCd/NiMH battery-powered systems. It delivers up to 600 mA output current, regulates fixed 2.5 V output (±3% over load/temperature), operates from 2.8–5.0 V input, and features external synchronization (600 kHz–1.2 MHz), programmable soft-start, and integrated P-channel MOSFET with 0.3 Ω typical RDS(ON). It serves as the primary voltage regulator in portable digital cameras.
For engineers reviewing the NCP1530DM25R2 datasheet, pinout, applications, or equivalent options, key selection criteria include its 2.5 V factory-programmed output, 47 µA no-load quiescent current, automatic PWM/PFM mode transition at ~83 mA (typ), 100% duty cycle capability, and Micro8 package compatibility with space-constrained handheld designs.
Technical Context
The NCP1530DM25R2 implements peak-current-mode PWM control with internal 600 kHz oscillator (±20% over temperature) and supports three operational modes: constant-frequency PWM (SYN = VIN), auto PWM/PFM (SYN = GND or floating), and externally synchronized PWM (SYN = 600–1200 kHz clock). Its feedback loop references an internally trimmed 1.20 V ±1.5% bandgap (VREF pin accessible), and regulation is achieved via VOUT pin sensing with 50 nA soft-start current sourced from SS pin.
It integrates undervoltage lockout (2.0 V typ), thermal shutdown (145°C trip, 15°C hysteresis), cycle-by-cycle current limit (1.5 A typ), and output overvoltage protection (6–12% above nominal). The LX pin drives an internal P-FET switch; no external high-side FET is required, and the device supports ceramic output capacitors down to 22 µF due to internal compensation.
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 (with VIN = 5.0 V, VOUT = 3.0 V; derated at lower input or higher output voltages) |
| Quiescent Current | 45 µA typ (VIN = 3.5 V, no load, EN active, SYN floating; enables >1000-hour battery life in standby) |
| Shutdown Current | 0.5 µA typ (VEN = 0 V; reduces system leakage during deep sleep) |
| Switching Frequency | 600 kHz (internal default); synchronizable to 600–1200 kHz external clock for EMI reduction or multi-rail coordination |
| PWM/PFM Transition | IPFM−PWM = 83 mA typ (load threshold where PFM activates for efficiency gain below light load) |
| Internal P-FET RDS(ON) | 0.3 Ω typ (at VIN = 3.5 V; limits conduction loss and thermal rise at full load) |
| Soft-Start Time | 500 µs typ (SS pin floating); extended via external capacitor (e.g., 100 pF → ~5 ms) to prevent inrush-induced rail collapse |
Pinout & Package
Package: Micro8™ (Case 846A), 3.0 mm × 3.0 mm × 0.95 mm, surface-mount, lead-free compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Unregulated input supply | Accepts 2.8–5.0 V; powers internal circuitry and P-FET; requires local 22 µF ceramic bypass |
| SYN (Pin 2) | Oscillator sync & mode select | GND/floating → auto PWM/PFM; VIN → fixed 600 kHz PWM; external clock → synchronized PWM (600–1200 kHz) |
| SS (Pin 3) | Soft-start timing control | Sources 50 nA to external capacitor; sets startup ramp time; floating = 500 µs intrinsic delay |
| GND (Pin 4) | Power and signal ground | Common return for VIN, LX, and internal circuits; must connect to low-impedance star ground point |
| EN (Pin 5) | Active-high enable | Logic high ≥1.5 V enables regulation; pulled to VIN internally; grounding forces 0.5 µA shutdown |
| VOUT (Pin 6) | Feedback input | Senses output voltage divider ratio; connects directly to resistor divider midpoint for closed-loop regulation |
| VREF (Pin 7) | Reference voltage access | Provides 1.20 V ±1.5% reference; decoupled with 1.0 µF capacitor for noise immunity and 5 mA load capability |
| LX (Pin 8) | Switch node | Drain of internal P-FET; connects to inductor; requires low-inductance layout to minimize ringing and EMI |
Key Features
| Feature | Design Value |
|---|---|
| Auto PWM/PFM mode switching | Maintains >85% efficiency at 1–10 mA loads by disabling switching circuitry and entering burst-mode operation |
| 100% duty cycle capability | Enables dropout operation down to VIN ≈ VOUT + 0.2 V, maximizing battery runtime in deep discharge |
| Externally programmable soft-start | Prevents output overshoot and input current surges using user-selected capacitor (e.g., 100 pF → 5 ms ramp) |
| Integrated 600 mA P-FET switch | Eliminates need for external high-side MOSFET; reduces BOM count and PCB footprint in compact designs |
| Ceramic-capacitor optimized design | Internally compensated for stable operation with low-ESR 22 µF ceramic output caps-no electrolytic required |
| Thermal shutdown with hysteresis | Shuts down at 145°C junction; restarts at 130°C, preventing thermal runaway during sustained overload |
Applications
| Digital Still Camera | Portable Audio System |
|---|---|
Use Scenario: Powering image sensor and ISP core requiring clean, regulated 2.5 V from 3.7 V Li-ion battery. IC Role / Device Role / Timing Role: Primary buck regulator providing low-noise, high-efficiency power conversion with fast transient response to burst capture events. Use Value: Achieves 92% peak efficiency at 300 mA (VIN = 4.3 V), minimizing heat in sealed camera housing and extending recording time per charge. |
Use Scenario: Supplying DSP and DAC in battery-powered Bluetooth speaker with variable audio load (1–500 mA). IC Role / Device Role / Timing Role: Adaptive voltage regulator that switches to PFM mode during silent intervals to reduce quiescent draw below 50 µA. Use Value: Extends playback time by >30% versus fixed-PWM converters due to sub-100 µA light-load operation and 0.5 µA shutdown. |
| Cellular Phone Baseband | Handheld Test Equipment |
Use Scenario: Generating 2.5 V for baseband processor core in dual-mode (GSM/EDGE) handset with tight thermal constraints. IC Role / Device Role / Timing Role: High-frequency (600 kHz) buck controller enabling use of 5.6 µH shielded inductor and 22 µF ceramic caps for minimal board area. Use Value: Reduces solution size by 40% vs. 300 kHz alternatives while maintaining <15 mV output ripple under dynamic load steps. |
Use Scenario: Powering microcontroller and analog front-end in portable multimeter operating from AA batteries. IC Role / Device Role / Timing Role: Input-supply regulator with UVLO (2.0 V) and thermal protection, ensuring safe operation during battery depletion or probe short-circuit. Use Value: Prevents erroneous readings or latch-up by cleanly disabling output when input drops below safe operating range. |
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 | Fixed 2.5 V output, 600 mA, 2.05–6.0 V input, 3.6 MHz switching, integrated synchronous rectifier | Higher frequency enables smaller inductors but increases EMI sensitivity; synchronous design improves light-load efficiency | Select for ultra-compact layouts needing <1.5 mm height; avoid if EMI filtering headroom is limited |
| AP3418WU-7 | Adjustable output (0.6–5.0 V), 600 mA, 2.5–5.5 V input, 1.5 MHz, PFM-only light-load mode | Lacks PWM/PFM auto-switching; requires external resistors for 2.5 V setting; no external sync pin | Choose when output voltage flexibility is needed; not drop-in for NCP1530DM25R2's fixed 2.5 V and sync functionality |
Compared with TPS62231DRYR and AP3418WU-7, the NCP1530DM25R2 offers unique value in battery-powered systems requiring guaranteed 2.5 V output, external clock synchronization for noise-sensitive RF sections, and seamless PWM-to-PFM transition without external components-features absent in both alternatives.
Availability
NCP1530DM25R2 is available at Aetrix Electronics and suitable for portable medical monitors, handheld barcode scanners, and industrial data loggers requiring stable component supply with long-term lifecycle assurance.
Supply support for NCP1530DM25R2 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 supplier specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, and portable electronics.
The NCP1530DM25R2 belongs to onsemi's NCP1530 family of compact, high-efficiency buck converters designed specifically for space- and battery-life-constrained portable devices operating from primary or rechargeable cells.
FAQ
What is the factory-programmed output voltage of the NCP1530DM25R2?
The NCP1530DM25R2 is factory-programmed to deliver a precise 2.5 V output voltage, with a tolerance of ±3% across operating temperature (0°C to +85°C) and load conditions (up to 150 mA). This fixed output eliminates the need for external feedback resistors and ensures consistent regulation in battery-powered applications like digital cameras and portable audio systems. The NCP1530DM25R2 achieves this via internal trimming of its 1.20 V reference and dedicated feedback path.
How does the NCP1530DM25R2 achieve high efficiency at light loads?
The NCP1530DM25R2 achieves high light-load efficiency through automatic PWM/PFM mode switching: below ~83 mA (typical), it transitions from fixed-frequency PWM to variable-frequency PFM operation, reducing switching losses and disabling non-essential circuitry. This allows the NCP1530DM25R2 to maintain >85% efficiency even at 1 mA output, significantly extending battery life in standby or low-activity states compared to fixed-PWM regulators.
Can the NCP1530DM25R2 be synchronized to an external clock, and what is the supported frequency range?
Yes, the NCP1530DM25R2 supports external synchronization via its SYN pin (Pin 2), accepting clock signals from 600 kHz to 1.2 MHz. When driven by an external source, the NCP1530DM25R2 locks its switching frequency to the input clock, enabling EMI reduction through frequency dithering or coordination with other system clocks-critical in RF-dense portable devices. The internal oscillator is automatically disabled during valid sync operation.
What protection features are integrated into the NCP1530DM25R2?
The NCP1530DM25R2 integrates multiple protection functions: undervoltage lockout (UVLO) triggers below 2.0 V input to prevent unstable operation; thermal shutdown activates at 145°C junction temperature with 15°C hysteresis; output overvoltage protection (OVP) disables switching if VOUT exceeds nominal by >6%; and cycle-by-cycle current limiting restricts peak inductor current to 1.5 A. These ensure robust, fault-tolerant performance in unattended portable equipment.
What is the recommended output capacitor for the NCP1530DM25R2, and why?
The NCP1530DM25R2 is optimized for 22 µF ceramic output capacitors (X5R/X7R grade), leveraging its internal compensation for stability with low-ESR types. Ceramic caps minimize output ripple (<15 mV typical) and eliminate electrolytic aging concerns. Using aluminum or tantalum alternatives risks instability or excessive ripple due to higher ESR; the NCP1530DM25R2's design explicitly targets ceramic performance, making them the only recommended choice for reliable, long-life operation.
NCP1530DM25R2 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
NCP1530DM25R2 FAQ
1.How can I place an order for NCP1530DM25R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1530DM25R2 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 NCP1530DM25R2 reliable?
The price and inventory of NCP1530DM25R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1530DM25R2 is usually 5 days.
3.What payment methods are accepted for NCP1530DM25R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1530DM25R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1530DM25R2?
NCP1530DM25R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1530DM25R2 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 NCP1530DM25R2?
For technical support, including NCP1530DM25R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1530DM25R2 requirements.
6.How does Aetrix verify that NCP1530DM25R2 is sourced from the original manufacturer or authorized distributors?
All NCP1530DM25R2 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 NCP1530DM25R2 meets industry standards.
7.What is the process for return or replacement of NCP1530DM25R2?
All NCP1530DM25R2 units undergo pre-shipment inspection (PSI). If there is an issue with NCP1530DM25R2, 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 NCP1530DM25R2 part is unused and in its original packaging.
Return procedure for NCP1530DM25R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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