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onsemi NCP1400ASN25T1
- Part No.:
- NCP1400ASN25T1
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP1400ASN25T1.pdf
- Description:
- IC REG BOOST 2.5V 80MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,799
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Product details
Overview
NCP1400ASN25T1 from onsemi is a fixed-frequency, micropower PWM step-up DC-DC switching regulator designed for ultra-low-voltage battery-powered portable systems. It starts up at 0.8 V, operates down to 0.2 V, delivers up to 100 mA output current at 2.5 V, and integrates oscillator, PWM controller, error amplifier, soft-start, and power MOSFET in TSOP-5 package. It powers white LED torch lights and low-power handheld instruments.
For engineers reviewing the NCP1400ASN25T1 datasheet, pinout, applications, or equivalent options, key selection criteria include startup voltage (0.8 V), regulated output (2.5 V ±2.5%), switching frequency (180 kHz ±20%), quiescent current (32 µA), and CE-controlled shutdown capability.
Technical Context
The NCP1400ASN25T1 implements a voltage-mode PWM boost architecture operating in discontinuous conduction mode (DCM) with internal phase-compensated error amplifier ensuring stability across full load and input ranges. Its 180 kHz oscillator has low temperature coefficient (0.11%/°C) and supports soft-start to limit inrush current during startup.
It uses cycle-by-cycle current limiting via VLX voltage monitoring to protect the integrated MOSFET, with typical current limit threshold of 350 mA. The chip enable (CE) pin features an internal 150 nA pull-up to OUT, allowing floating-pin operation for always-on use or logic-level control for power-down mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±2.5% - factory-trimmed internal feedback network enables single-supply 2.5 V rail generation without external resistors. |
| Switching Frequency | 180 kHz ±20% - fixed-frequency PWM operation enables predictable EMI filtering and stable loop design in DCM. |
| Startup Voltage | 0.8 V (typ) - allows reliable startup from nearly-dead single-cell alkaline or NiMH batteries. |
| Max Output Current | 100 mA - sufficient to drive multiple white LEDs or low-power microcontrollers in portable devices. |
| Quiescent Current | 32 µA (typ at VOUT = 2.7 V) - minimizes battery drain during active operation; drops to 1.5 µA in CE-disabled state. |
| Operating Temp Range | −40°C to +85°C - qualified for industrial and consumer portable equipment environments. |
| Package | TSOP-5 (Case 483) - 3.0 × 1.5 mm surface-mount package optimized for space-constrained handheld designs. |
Pinout & Package
Package: TSOP-5 (Case 483), Pb-free, RoHS-compliant, 3.0 mm × 1.5 mm footprint with 0.95 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CE | Chip Enable input | Logic-controlled shutdown: ≥0.9 V enables regulation; ≤0.3 V disables IC; floating defaults to enabled via internal 150 nA pull-up to OUT. |
| 2 - OUT | Output voltage monitor & supply | Provides regulated 2.5 V output and powers internal circuitry; also serves as reference for CE pull-up. |
| 3 - NC | No connection | Internally unconnected; must remain unconnected on PCB to avoid parasitic coupling or latch-up risk. |
| 4 - GND | Power ground | Common return path for input, output, and internal switch; requires low-impedance one-point grounding per layout guidelines. |
| 5 - LX | Switch node | Drain connection of internal power MOSFET; interfaces directly to external inductor and Schottky diode anode. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low startup voltage | 0.8 V enables operation from near-exhausted primary cells, extending usable battery life in remote sensors and flashlights. |
| Integrated soft-start | 2.0 ms typical ramp time prevents output overshoot and limits inrush current into output capacitor during cold start. |
| Discontinuous mode stability | On-chip phase compensation ensures stable regulation across 0–100 mA load without external compensation components. |
| Current-limited power switch | Internal MOSFET with cycle-by-cycle current limiting protects against inductor saturation and overcurrent faults up to 350 mA peak. |
| Low-noise fixed-frequency PWM | 180 kHz operation avoids audible noise and simplifies EMI filter design compared to variable-frequency alternatives. |
Applications
| White LED Torch Light | Portable Medical Sensor |
|---|---|
Use Scenario: Battery-powered handheld flashlight using single AA/AAA cell to drive 1–3 white LEDs. IC Role / Device Role / Timing Role: Step-up regulator generating stable 2.5 V rail to bias LED string with constant current driver. Use Value: Enables full brightness from 0.8 V input, extending runtime by >30% vs. higher-startup alternatives; 32 µA quiescent current preserves standby life. | Use Scenario: Wearable pulse oximeter powered by coin cell with intermittent measurement cycles. IC Role / Device Role / Timing Role: Supplies regulated 2.5 V to analog front-end and low-power MCU during active sensing bursts. Use Value: Ultra-low hold voltage (0.2 V) allows full utilization of CR2032 capacity; CE pin enables precise MCU-controlled power gating. |
| Handheld Barcode Scanner | IoT Remote Control Unit |
Use Scenario: Low-cost infrared barcode scanner using two alkaline cells and intermittent laser/decoder activation. IC Role / Device Role / Timing Role: Generates 2.5 V for laser diode driver and decoder IC during short-duration scan events. Use Value: 100 mA peak current supports brief high-power pulses; TSOP-5 footprint saves board area in slim form factor. | Use Scenario: Sub-GHz RF remote with multi-button interface and LED status indicators. IC Role / Device Role / Timing Role: Powers 2.5 V logic and RF transceiver from single alkaline cell during button press and transmission. Use Value: 180 kHz fixed frequency avoids interference with RF bands; CE pin synchronizes regulator enable with transmit window. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6109925DSER | Higher efficiency (92% vs. 85% typ), lower quiescent current (300 nA), but requires external feedback resistors and lacks integrated 2.5 V trim. | Suitable for ultra-long-life IoT nodes where efficiency dominates; not drop-in due to resistor-based VOUT setting. | Select when minimum BOM count is secondary to battery lifetime; verify layout compatibility with 6-pin WSON package. |
| MAX17222ATA+T | Wider input range (0.4 V–5.5 V), higher output current (120 mA), but larger 6-pin TDFN package and no integrated 2.5 V option. | Better for multi-cell or hybrid power sources; requires external resistor divider for 2.5 V output. | Choose when future voltage flexibility or higher current margin is needed; rework required for TSOP-5 footprint replacement. |
Compared with TPS6109925DSER and MAX17222ATA+T, the NCP1400ASN25T1 offers true plug-and-play 2.5 V regulation in the smallest footprint, prioritizing simplicity and minimal external component count over ultimate efficiency or programmability.
Availability
NCP1400ASN25T1 is available at Aetrix Electronics and suitable for white LED torch lights, portable medical sensors, handheld barcode scanners, and IoT remote control units requiring stable component supply and long-term manufacturability.
Supply support for NCP1400ASN25T1 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 electronics for automotive, industrial, cloud, and intelligent edge applications.
The NCP1400ASN25T1 belongs to the NCP1400A micropower step-up regulator product line, engineered specifically for ultra-low-voltage battery-powered portable devices where startup reliability and minimal external components are critical.
FAQ
What is the minimum input voltage required for NCP1400ASN25T1 to start regulating?
The NCP1400ASN25T1 has a typical minimum startup voltage of 0.8 V, with a maximum of 0.95 V across temperature. This allows it to begin regulation from nearly depleted single-cell batteries. The device continues operating down to less than 0.2 V input, making it ideal for maximizing battery utilization in portable lighting and sensor applications. Always validate startup behavior under worst-case conditions including load and temperature.
Does NCP1400ASN25T1 require external feedback resistors to set its 2.5 V output?
No, the NCP1400ASN25T1 does not require external feedback resistors. Its 2.5 V output is factory-trimmed using an internal resistor network, enabling true single-component solution with only four external parts: inductor, Schottky diode, input capacitor, and output capacitor. This eliminates resistor tolerance errors and layout sensitivity associated with external dividers.
How does the CE pin function on NCP1400ASN25T1, and what happens if left floating?
The CE pin on NCP1400ASN25T1 controls enable/disable state. When left floating, an internal 150 nA pull-up current source connects it to the OUT pin, automatically enabling the regulator. Applying ≥0.9 V enables normal operation; ≤0.3 V disables the IC, reducing quiescent current to 1.5 µA. Voltages between 0.3 V and 0.9 V must be avoided as they place the device in undefined state and may cause excessive current draw.
What is the recommended inductor value for NCP1400ASN25T1 in a typical 2.5 V output application?
The recommended inductor value for NCP1400ASN25T1 is 22 µH, as validated in the datasheet's typical application circuit and efficiency curves. Inductors between 18 µH and 27 µH are acceptable; smaller values increase peak current and output capability but reduce efficiency, while larger values improve efficiency at light loads but limit peak current. Use low-DCR (<1.0 Ω) shielded inductors rated for ≥350 mA saturation current.
Is NCP1400ASN25T1 RoHS-compliant and lead-free?
Yes, the NCP1400ASN25T1 is RoHS-compliant and Pb-free, as confirmed in the official onsemi datasheet (Publication Order Number: NCP1400A/D, Rev. 12). The TSOP-5 package carries the "Pb-Free Package" marking, and the device meets JEDEC J-STD-020A moisture sensitivity level (MSL) 1 requirements for standard surface-mount assembly processes.
NCP1400ASN25T1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.8V
- Voltage - Input (Max):
- 2.5V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 80mA (Switch)
- Frequency - Switching:
- 180kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP1400ASN25T1 FAQ
1.How can I place an order for NCP1400ASN25T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1400ASN25T1 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 NCP1400ASN25T1 reliable?
The price and inventory of NCP1400ASN25T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1400ASN25T1 is usually 5 days.
3.What payment methods are accepted for NCP1400ASN25T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1400ASN25T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1400ASN25T1?
NCP1400ASN25T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1400ASN25T1 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 NCP1400ASN25T1?
For technical support, including NCP1400ASN25T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1400ASN25T1 requirements.
6.How does Aetrix verify that NCP1400ASN25T1 is sourced from the original manufacturer or authorized distributors?
All NCP1400ASN25T1 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 NCP1400ASN25T1 meets industry standards.
7.What is the process for return or replacement of NCP1400ASN25T1?
All NCP1400ASN25T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP1400ASN25T1, 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 NCP1400ASN25T1 part is unused and in its original packaging.
Return procedure for NCP1400ASN25T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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