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onsemi NCP4587DSN12T1G
- Part No.:
- NCP4587DSN12T1G
- Manufacturer:
- onsemi
- Package:
- SC-74A, SOT-753
- Datasheet:
-
NCP4587DSN12T1G.pdf
- Description:
- IC REG LINEAR 1.2V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
NCP4587DSN12T1G from onsemi is a 150 mA tri-mode CMOS LDO voltage regulator with 1.2 V fixed output, ultra-thin SOT-23-5 package, 120 mV typical dropout at 150 mA (VOUT > 2.6 V), ±1% output accuracy (VOUT > 2 V, TJ = 25°C), and auto Eco/fast mode switching via AE pin. It delivers stable power to image sensors and portable communication modules under light-load battery conditions.
For engineers reviewing the NCP4587DSN12T1G datasheet, pinout, applications, or equivalent options, key selection criteria include tri-mode quiescent current (1.0 µA low-power / 55 µA fast / 0.1 µA standby), 70 dB PSRR at 1 kHz in fast mode, ceramic-capacitor stability, and 1.2 V fixed output with 0.4 mm profile for space-constrained PCBs.
Technical Context
The NCP4587DSN12T1G implements a CMOS-based LDO architecture with integrated N-channel pass transistor, enabling low dropout and high PSRR. Its tri-mode operation-low-power, fast, and standby-is controlled by the AE pin and automatic load-sensing circuitry that switches modes at 1–2 mA (light-to-heavy) and 8 mA (heavy-to-light).
It features fold-back current limiting, internal CE pull-down (0.1 µA), AE threshold logic (1.0 V "H", 0.4 V "L"), and output discharge capability (D-version). Thermal design is supported by RJA = 238 °C/W in SOT-23, with safe operating area defined up to 400 mA IOUT and 6.0 V VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.2 V ±1% (at VOUT > 2 V, TJ = 25°C); ensures precise biasing for 1.2 V core rails in image sensors and baseband ICs. |
| Max Output Current | 150 mA continuous; supports moderate-power analog/RF blocks without thermal derating on standard FR-4. |
| Dropout Voltage | 120 mV typ. at 150 mA (VOUT > 2.6 V); enables regulation from 1.32 V input, critical for single-cell Li-ion or Li-poly systems. |
| Quiescent Current | 1.0 µA (low-power mode), 55 µA (fast mode), 0.1 µA (standby); extends battery life in always-on sensor wake-up circuits. |
| PSRR | 70 dB at 1 kHz (fast mode); suppresses switching noise from PMICs or DC-DC converters feeding adjacent analog sections. |
| Stability | Stable with ≥0.47 µF ceramic output capacitor; eliminates need for tantalum or electrolytic caps, reducing board area and cost. |
| Operating Input Range | 1.4 V to 5.25 V; compatible with wide-input battery sources including coin cells, Li-ion, and regulated 3.3/5 V rails. |
Pinout & Package
SOT-23-5 package (Case 1212), 2.7 × 2.5 × 1.3 mm body, 0.95 mm pitch, Pb-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input supply | Accepts 1.4–5.25 V; requires local 1 µF ceramic decoupling to minimize line transients. |
| 2 - GND | Ground reference | Common return for input/output paths; must be low-impedance connection to minimize noise coupling. |
| 3 - CE | Chip enable (active high) | Logic-high (>1.0 V) enables regulator; internal 0.1 µA pull-down allows direct tie-to-VIN if unused. |
| 4 - VOUT | Regulated output | Delivers 1.2 V ±1%; connects to load and 1 µF ceramic capacitor placed adjacent to pin. |
| 5 - AE | Auto Eco mode select | Low/floating → auto Eco (low IQ); high (>1.0 V) → permanent fast mode (55 µA, improved transient response). |
Key Features
| Feature | Design Value |
|---|---|
| Tri-mode operation | Automatically toggles between low-power (1.0 µA), fast (55 µA), and standby (0.1 µA) based on load current thresholds (1–2 mA / 8 mA), optimizing battery runtime without firmware intervention. |
| Ultra-low dropout | 120 mV typical at 150 mA enables use with weak or aging batteries while maintaining 1.2 V output for sensitive analog cores. |
| Ceramic-capacitor stability | Guaranteed stable with ≥0.47 µF X5R/X7R ceramics; avoids ESR dependency and simplifies layout versus tantalum-based LDOs. |
| Output discharge (D-version) | Integrated VOUT-to-GND transistor discharges output capacitance rapidly during shutdown, preventing back-powering of downstream circuitry. |
| High PSRR in fast mode | 70 dB at 1 kHz suppresses ripple from noisy switchers, preserving signal integrity in camera ISP and RF front-end power domains. |
Applications
| Image Sensor Power | Portable Baseband IC Supply |
|---|---|
Use Scenario: Powers 1.2 V analog/digital cores of CMOS image sensors in smartphones and IoT cameras during active capture and standby. IC Role / Device Role / Timing Role: Provides low-noise, fast-transient 1.2 V rail with auto Eco mode to minimize idle current between frames. Use Value: Enables >200-hour battery life in always-on vision sensors by reducing quiescent current to 1.0 µA during inter-frame intervals. |
Use Scenario: Supplies 1.2 V core voltage to cellular baseband processors in compact handheld radios and LTE modems. IC Role / Device Role / Timing Role: Delivers regulated 1.2 V with 70 dB PSRR to reject switching noise from PMIC DC-DC converters. Use Value: Prevents digital noise coupling into RF receive paths, maintaining >30 dB SNR in sub-1 GHz ISM band receivers. |
| Wearable Health Monitor Bias | Low-Power MCU Core Rail |
Use Scenario: Powers optical heart-rate monitor (PPG) analog front-end and ADC in wrist-worn fitness trackers. IC Role / Device Role / Timing Role: Supplies clean 1.2 V reference to precision current sources and transimpedance amplifiers. Use Value: Achieves <115 µVRMS output noise (10 Hz–100 kHz), ensuring sub-1% measurement error in photodiode current sensing. |
Use Scenario: Provides 1.2 V core voltage to ARM Cortex-M0+ microcontrollers in battery-powered industrial sensors. IC Role / Device Role / Timing Role: Regulates MCU core rail with fast load transient response (<10 µs recovery) during wake-from-sleep bursts. Use Value: Supports 100 µs wake-up latency by maintaining output regulation during 1–150 mA load steps without brownout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1202E/TT | Fixed 1.2 V, 250 mA, 6 µA IQ, no tri-mode or AE pin; SOT-23-3 package (no CE/AE pins). | Lacks auto Eco switching and output discharge; suitable only for static low-IQ applications without dynamic load management. | Select when system firmware handles enable sequencing and output discharge is unnecessary. |
| TLS850B2TE/V1 | 5 V input, 1.2 V/300 mA, 30 µA IQ, integrated watchdog and reset; PG-TO252-5 package (larger, higher thermal mass). | Includes safety features (reset, watchdog) and higher current; not pin-compatible and requires different PCB footprint. | Select for automotive ASIL-B systems requiring functional safety monitoring, not consumer portables. |
Compared with MCP1700T-1202E/TT and TLS850B2TE/V1, the NCP4587DSN12T1G uniquely combines tri-mode IQ optimization, SOT-23-5 pinout with dedicated AE control, and D-version output discharge-enabling autonomous power-state adaptation in space-constrained, battery-sensitive designs without added external logic.
Availability
NCP4587DSN12T1G is available at Aetrix Electronics and suitable for portable medical monitors, smartphone image sensor subsystems, and wearable health devices requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for NCP4587DSN12T1G 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, and sensor solutions for automotive, industrial, and portable electronics.
The NCP4587DSN12T1G belongs to the NCP4587 family of tri-mode LDOs designed specifically for ultra-low-power battery-operated devices where dynamic IQ scaling and fast transient response are essential for extended runtime and signal integrity.
FAQ
What is the output voltage tolerance of the NCP4587DSN12T1G over temperature?
The NCP4587DSN12T1G provides ±1% output voltage accuracy at TJ = 25°C for VOUT > 2 V. Over the full operating temperature range (−40°C to +85°C), output voltage deviation is ±2.5% for VOUT > 2 V and ±30 mV for VOUT ≤ 2 V. Since the NCP4587DSN12T1G is a 1.2 V fixed-output variant, its guaranteed tolerance is ±30 mV across −40°C to +85°C per datasheet Section 3 (ELECTRICAL CHARACTERISTICS).
Does the NCP4587DSN12T1G require an external resistor to set output voltage?
No, the NCP4587DSN12T1G is a fixed-output LDO with factory-trimmed 1.2 V regulation. It does not support adjustable output via external resistors. The device is part of the NCP4587 family offering multiple fixed voltages (1.2 V, 1.8 V, 2.8 V, etc.) in standardized packages; output voltage is determined solely by the part number suffix and cannot be modified externally.
How does the AE pin affect the NCP4587DSN12T1G's quiescent current and transient response?
When the AE pin is low or floating, the NCP4587DSN12T1G operates in Auto Eco mode: quiescent current drops to 1.0 µA under light loads (<1 mA), but transient response slows. When AE is pulled high (>1.0 V), it enters permanent Fast Mode: quiescent current rises to 55 µA, but load transient recovery time improves significantly. This dual behavior is confirmed in Figures 13–14 and Application Information section of the NCP4587 datasheet.
Is the NCP4587DSN12T1G compatible with ceramic output capacitors?
Yes, the NCP4587DSN12T1G is explicitly characterized and guaranteed stable with ≥0.47 µF ceramic output capacitors (X5R/X7R dielectrics), as stated in the Features list and APPLICATION INFORMATION section. Unlike many older LDOs, it does not require minimum ESR or tantalum capacitors-reducing BOM count and PCB area while improving reliability.
What protection features are integrated into the NCP4587DSN12T1G?
The NCP4587DSN12T1G integrates fold-back current limiting (50 mA short-circuit current), thermal shutdown (TJ > 150°C), and reverse-current blocking. It also includes output discharge functionality (D-version) that actively pulls VOUT to GND during disable, preventing back-powering. These protections are documented in Absolute Maximum Ratings, Electrical Characteristics, and Application Information sections of the official datasheet.
NCP4587DSN12T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.4V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 4 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
NCP4587DSN12T1G FAQ
1.How can I place an order for NCP4587DSN12T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4587DSN12T1G 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 NCP4587DSN12T1G reliable?
The price and inventory of NCP4587DSN12T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4587DSN12T1G is usually 5 days.
3.What payment methods are accepted for NCP4587DSN12T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4587DSN12T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP4587DSN12T1G?
NCP4587DSN12T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4587DSN12T1G 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 NCP4587DSN12T1G?
For technical support, including NCP4587DSN12T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4587DSN12T1G requirements.
6.How does Aetrix verify that NCP4587DSN12T1G is sourced from the original manufacturer or authorized distributors?
All NCP4587DSN12T1G 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 NCP4587DSN12T1G meets industry standards.
7.What is the process for return or replacement of NCP4587DSN12T1G?
All NCP4587DSN12T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP4587DSN12T1G, 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 NCP4587DSN12T1G part is unused and in its original packaging.
Return procedure for NCP4587DSN12T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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