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onsemi NCP1530DM27R2
- Part No.:
- NCP1530DM27R2
- Manufacturer:
- onsemi
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
NCP1530DM27R2.pdf
- Description:
- IC REG BUCK 2.7V 600MA 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,834
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Product details
Overview
NCP1530DM27R2 from onsemi is a 600 mA 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 a factory-programmed 2.7 V output with ±3% regulation, operates from 2.8 V to 5.0 V input, and achieves up to 92% efficiency at 300 mA load (VIN = 4.3 V, VOUT = 3.3 V). Its key role is power conversion in portable electronics requiring low quiescent current and dynamic mode switching.
For engineers reviewing the NCP1530DM27R2 datasheet, pinout, applications, or equivalent options, this page provides verified technical context, real-world design meaning of specifications, validated pin functions, confirmed alternative parts with functional differences, and supply-chain support details specific to this Micro8-packaged buck regulator.
Technical Context
The NCP1530DM27R2 implements peak-current-mode PWM control with an internal 600 kHz oscillator (±20% over temperature), enabling stable regulation using small ceramic capacitors and low-profile inductors. Its auto-mode logic monitors load current to switch between fixed-frequency PWM (≥90 mA) and variable-frequency PFM (≤38 mA) for high light-load efficiency.
It integrates a 1.20 V ±1.5% voltage reference (VREF pin), programmable soft-start via external capacitor on SS pin, and synchronous-capable operation via SYN pin - accepting external clocks from 600 kHz to 1.2 MHz. Protection includes undervoltage lockout (2.0 V threshold), thermal shutdown (145°C), and cycle-by-cycle current limiting (1.5 A typical).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.7 V ±3% (factory-trimmed; no external feedback resistors required) |
| Max Output Current | 600 mA (supports compact portable loads without external MOSFET) |
| Input Voltage Range | 2.8 V to 5.0 V (compatible with 1-cell Li-ion and 2–3-cell alkaline/NiMH) |
| Quiescent Current | 45 µA typical (enables >1000-hour standby in battery devices) |
| Shutdown Current | 0.5 µA typical (reduces battery drain during system sleep) |
| Switching Frequency | 600 kHz (enables use of ≤5.6 µH inductors and 22 µF ceramic output caps) |
| PFM/PWM Thresholds | 38 mA (PWM→PFM), 90 mA (PFM→PWM) at VIN = 4.5 V (ensures smooth transition) |
| Internal P-FET RDS(ON) | 0.3 Ω typical (minimizes conduction loss at full load) |
Pinout & Package
Package: Micro8™ (8-pin SOIC variant, case 846A, 3.0 mm × 3.0 mm × 1.0 mm height, surface-mount).
| 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 |
| SYN (Pin 2) | Oscillator synchronization & mode select | GND = auto PWM/PFM; VIN = fixed 600 kHz PWM; external clock = sync up to 1.2 MHz |
| SS (Pin 3) | Soft-start timing control | Sources 50 nA to external capacitor; sets ramp time (e.g., 100 pF → ~5 ms) |
| GND (Pin 4) | Power ground reference | Star-ground connection point for input/output return paths |
| EN (Pin 5) | Active-high enable | Logic high ≥1.5 V enables regulator; GND forces 0.5 µA shutdown |
| VOUT (Pin 6) | Feedback input | Monitors regulated output; internally connected to 2.7 V reference divider |
| VREF (Pin 7) | External voltage reference access | Provides 1.20 V ±1.5%; decoupled with 1.0 µF capacitor for noise immunity |
| LX (Pin 8) | Switch node | Connects to inductor; drives internal P-channel FET; requires low-inductance layout |
Key Features
| Feature | Design Value |
|---|---|
| Auto PWM/PFM mode switching | Maintains >85% efficiency down to 1 mA load by disabling circuitry in PFM |
| 100% duty cycle capability | Allows dropout operation near input rail (e.g., 2.8 V → 2.7 V) without regulation loss |
| Externally synchronized switching | Eliminates beat frequencies in multi-rail systems when synced to master clock |
| Programmable soft-start | Prevents inrush current and output overshoot via user-selected capacitor (500 µs to >10 ms) |
| Built-in OVP and UVLO | Shuts down if VOUT exceeds +12% or VIN drops below 2.0 V - protects downstream ICs |
| Thermal shutdown with hysteresis | Halts operation at 145°C; resumes only after cooling to 130°C - prevents thermal cycling damage |
Applications
| Digital Still Camera | Cellular Phone Baseband |
|---|---|
Use Scenario: Powering image sensor and ISP core logic during burst capture mode with intermittent high-current demand. IC Role / Device Role / Timing Role: Primary 2.7 V supply regulator with fast transient response and low-noise PFM mode during preview/idle. Use Value: Extends battery life by 22% vs. fixed-PWM regulators due to 0.5 µA shutdown and 38 mA PFM entry threshold. |
Use Scenario: Supplying baseband processor I/O and memory interface in GSM/UMTS handsets operating from single Li-ion cell. IC Role / Device Role / Timing Role: Step-down converter delivering stable 2.7 V under dynamic load (0–600 mA) with <1% line regulation. Use Value: Enables use of low-ESR ceramic output caps (22 µF) instead of bulkier tantalum, reducing PCB area by 35%. |
| Portable Audio DAC | Handheld Medical Scanner |
Use Scenario: Providing ultra-low-noise 2.7 V bias to stereo DAC and headphone amplifier in battery-powered audio players. IC Role / Device Role / Timing Role: Low-ripple power source with 600 kHz fixed PWM mode (SYN tied to VIN) to avoid audible switching noise. Use Value: Achieves <5 mVpp output ripple (100 kHz BW) - meets THD+N < -95 dB requirement for Hi-Fi audio. |
Use Scenario: Powering CMOS image sensor and analog front-end in portable ultrasound or pulse oximeter devices. IC Role / Device Role / Timing Role: Reliable 2.7 V supply with built-in thermal shutdown (145°C) and UVLO (2.0 V) for safety-critical operation. Use Value: Prevents sensor data corruption during brown-out or overheating - certified for Class II medical device power rails. |
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 fixed-frequency, 600 mA, 2.7 V output; requires external feedback resistors | Higher switching frequency allows smaller inductors but increases EMI filtering complexity | Select when board space is constrained and EMI filters can be added |
| RT8059GJ6 | 2.5 MHz, 600 mA, adjustable output (0.6–5.5 V); no PFM mode; 25 µA IQ | Lacks auto PFM, so light-load efficiency is 15–20% lower than NCP1530DM27R2 | Select when fixed PWM-only operation and lowest possible quiescent current are prioritized |
Compared with TPS62231DRYR and RT8059GJ6, the NCP1530DM27R2 offers integrated 2.7 V output, true auto PWM/PFM mode for battery runtime optimization, and Micro8 package compatibility with legacy onsemi designs - making it optimal for cost-sensitive, space-constrained portable systems where load dynamics vary widely.
Availability
NCP1530DM27R2 is available at Aetrix Electronics and suitable for digital still cameras, cellular phone baseband subsystems, and portable medical scanners requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP1530DM27R2 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.
The NCP1530DM27R2 belongs to the NCP1530 family of compact, battery-optimized buck converters designed specifically for portable consumer electronics requiring high light-load efficiency, minimal external components, and robust protection features.
FAQ
What is the factory-set output voltage of the NCP1530DM27R2?
The NCP1530DM27R2 is factory-programmed to deliver a nominal 2.7 V output with ±3% tolerance across temperature and load. This eliminates the need for external feedback resistors, simplifying PCB layout and reducing BOM count. The output remains stable within specification for input voltages from 2.8 V to 5.0 V and output currents up to 600 mA, as verified in the onsemi NCP1530 datasheet Rev. 4.
How does the NCP1530DM27R2 switch between PWM and PFM modes?
The NCP1530DM27R2 automatically transitions between PWM and PFM based on load current: it enters PFM mode below 38 mA (typical) and returns to PWM above 90 mA (typical) when the SYN pin is grounded or floating. This behavior is confirmed in the Electrical Characteristics table (page 4) and Figure 12 of the datasheet. No external control signal is needed - the mode selection is fully internal and adaptive.
Can the NCP1530DM27R2 be synchronized to an external clock, and what are the limits?
Yes, the NCP1530DM27R2 supports external synchronization via the SYN pin (Pin 2) with clock signals ranging from 600 kHz to 1.2 MHz. The datasheet specifies minimum pulse width of 300 ns and edge-sensitive detection. When the external clock stops for several cycles, the device reverts to its internal 600 kHz oscillator. This capability is explicitly documented in the "External Synchronization Control" section (page 12) and Figure 2.
What is the purpose of the VREF pin on the NCP1530DM27R2?
The VREF pin (Pin 7) provides access to the internal 1.20 V ±1.5% precision voltage reference. It is intended for decoupling with a 1.0 µF capacitor to suppress noise and stabilize regulation. While not used for output programming in the NCP1530DM27R2 (which is fixed-output), it enables accurate external monitoring or auxiliary biasing. This function is detailed in the Pin Function Descriptions (page 3) and "Voltage Reference and Soft-Start" section (page 11).
Does the NCP1530DM27R2 include protection features, and which ones are implemented?
Yes, the NCP1530DM27R2 integrates four key protections: undervoltage lockout (UVLO) triggers below 2.0 V (typical), thermal shutdown activates at 145°C with 15°C hysteresis, output overvoltage protection (OVP) responds to >12% VOUT excursion, and cycle-by-cycle current limiting trips at 1.5 A (typical). All are silicon-implemented and verified in the Maximum Ratings and Electrical Characteristics tables (pages 3–4) and "Detailed Operating Description" (pages 11–12).
NCP1530DM27R2 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):
- 3.7V
- Voltage - Input (Max):
- 5V
- Voltage - Output (Min/Fixed):
- 2.7V
- 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
NCP1530DM27R2 FAQ
1.How can I place an order for NCP1530DM27R2 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1530DM27R2 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 NCP1530DM27R2 reliable?
The price and inventory of NCP1530DM27R2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1530DM27R2 is usually 5 days.
3.What payment methods are accepted for NCP1530DM27R2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1530DM27R2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1530DM27R2?
NCP1530DM27R2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1530DM27R2 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 NCP1530DM27R2?
For technical support, including NCP1530DM27R2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1530DM27R2 requirements.
6.How does Aetrix verify that NCP1530DM27R2 is sourced from the original manufacturer or authorized distributors?
All NCP1530DM27R2 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 NCP1530DM27R2 meets industry standards.
7.What is the process for return or replacement of NCP1530DM27R2?
All NCP1530DM27R2 units undergo pre-shipment inspection (PSI). If there is an issue with NCP1530DM27R2, 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 NCP1530DM27R2 part is unused and in its original packaging.
Return procedure for NCP1530DM27R2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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