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onsemi NCP1400ASN50T1
- Part No.:
- NCP1400ASN50T1
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP1400ASN50T1.pdf
- Description:
- IC REG BOOST 5V 100MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,685
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Product details
Overview
NCP1400ASN50T1 from onsemi is a fixed-frequency, micropower PWM step-up DC-DC switching regulator in TSOP-5 package, designed for ultra-low-voltage battery-powered systems. It starts up at 0.8 V, operates down to 0.2 V, delivers up to 100 mA output current at 5.0 V, and integrates oscillator, error amplifier, soft-start, and power MOSFET - enabling efficient boost conversion with only four external components.
For engineers reviewing the NCP1400ASN50T1 datasheet, pinout, applications, or equivalent options, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-ready availability details for portable low-power designs.
Technical Context
The NCP1400ASN50T1 implements voltage-mode PWM control in discontinuous conduction mode (DCM), using an internal 180 kHz oscillator (±20% tolerance, 0.11%/°C tempco) and phase-compensated error amplifier for stable regulation without external compensation. Its fixed 5.0 V output is trimmed via on-chip feedback resistors with ±2.5% accuracy over temperature.
Startup and hold behavior is defined by dedicated thresholds: minimum startup voltage is 0.8 V (typ), decreasing −1.6 mV/°C; minimum hold voltage is 0.3 V (min). Chip enable (CE) uses an internal 150 nA pull-up to OUT, allowing floating-pin operation or logic-level shutdown with <0.3 V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0 V (±2.5% over −40°C to +85°C); enables direct powering of 5 V logic or analog rails from single-cell batteries. |
| Switching Frequency | 180 kHz (typ, ±20%); balances EMI, inductor size (22 µH optimal), and efficiency in portable applications. |
| Startup Voltage | 0.8 V (typ); allows operation from deeply discharged alkaline or NiMH cells, extending usable battery life. |
| Max Output Current | 100 mA (at VIN ≥ 1.5 V); supports moderate loads like white LEDs, small displays, or sensor interfaces. |
| Quiescent Current | 70 µA (typ, VOUT = 5.0 V); ensures micropower operation during light-load or standby conditions. |
| Shutdown Current | 0.6 µA (typ, CE = 0 V); reduces system leakage when disabled, critical for long-term battery retention. |
| Operating Temp Range | −40°C to +85°C ambient; qualified for industrial and consumer portable equipment environments. |
Pinout & Package
Package: TSOP-5 (Case 483), Pb-free, surface-mount, 3.0 × 1.5 mm footprint with 0.95 mm pitch. Thermal resistance RJA = 250°C/W.
| 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 rail | Provides regulated 5.0 V output and powers internal circuitry; also serves as reference for CE pull-up and feedback network. |
| 3 - NC | No internal connection | Unbonded pad; must be left unconnected - no routing or grounding required. |
| 4 - GND | Power and signal ground | Common return for input, output, and internal circuits; requires low-impedance one-point grounding per layout guidelines. |
| 5 - LX | Switch node (drain of internal MOSFET) | Connects to inductor and Schottky diode anode; carries high dI/dt switching current; requires short, wide PCB trace. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low startup voltage | 0.8 V enables use with single Alkaline/NiMH cells even at end-of-life, eliminating need for auxiliary wake-up circuitry. |
| Integrated power switch | On-die MOSFET with cycle-by-cycle current limit (~350 mA peak) eliminates external switch and simplifies BOM. |
| Self-stabilizing DCM architecture | No external compensation needed - internal phase compensation guarantees stability across full load and input range. |
| Soft-start function | Ramps output to ~1.5 V before closed-loop regulation begins, preventing inrush current and improving startup under load. |
| Pb-free & RoHS-compliant | Meets global environmental regulations; TSOP-5 package supports standard reflow profiles (MSL Level 1). |
Applications
| White LED Backlighting | Low-Power Microcontroller Supply |
|---|---|
Use Scenario: Powering 3–5 white LEDs (3.0–3.6 V forward) from a single 1.5 V alkaline cell in handheld medical devices. IC Role / Device Role / Timing Role: Step-up regulator providing stable 5.0 V rail to LED driver IC; operates in DCM for consistent dimming control. Use Value: Enables >100 mA LED current with >80% efficiency at 1.2 V input, extending battery runtime beyond 20 hours. |
Use Scenario: Supplying 5.0 V to an ultra-low-power MCU (e.g., PIC16LF1509) and its I²C sensors in a wireless sensor node. IC Role / Device Role / Timing Role: Primary power source during active sensing cycles; CE pin synchronized with MCU sleep/wake to minimize quiescent draw. Use Value: Delivers 70 µA operating current and 0.6 µA shutdown current, reducing average system power by 4× vs. LDO-based solutions. |
| Digital Camera Flash Support | Portable Audio Codec Bias |
Use Scenario: Providing burst-capable 5.0 V to a xenon flash capacitor charger IC in compact digital cameras. IC Role / Device Role / Timing Role: High-efficiency boost stage delivering short-duration 100 mA pulses; LX pin handles fast transient switching. Use Value: Achieves 85% peak efficiency at 100 mA with 22 µH inductor, enabling flash recharge in <1.5 s from 1.2 V input. |
Use Scenario: Generating clean 5.0 V bias for audio codec line drivers and headphone amplifiers in Bluetooth earbuds. IC Role / Device Role / Timing Role: Low-noise, fixed-frequency PWM regulator; ripple suppressed via 68 µF low-ESR tantalum output cap. Use Value: Maintains <20 mVpp output ripple at 30 mA load, preventing audible noise in analog audio paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61200DRCT | Higher 600 mA output capability; 500 kHz switching; requires external compensation; 2.5 V min startup. | Better suited for higher-current loads (e.g., color LCDs); less suitable for sub-1 V battery start-up. | Select if >100 mA output or faster transient response is required; verify layout for higher-frequency EMI control. |
| MAX756CSA+ | 280 kHz fixed frequency; 1.5 V min startup; no CE pin; ±4% output accuracy; requires external compensation. | Lacks enable control and ultra-low-voltage startup; lower output accuracy limits precision analog use. | Choose only when CE functionality and 0.8 V startup are not required; confirm stability with recommended RC network. |
Compared with TPS61200DRCT and MAX756CSA+, the NCP1400ASN50T1 uniquely combines 0.8 V startup, integrated CE, no-external-compensation stability, and 5.0 V precision in a 3.0 × 1.5 mm TSOP-5 package - making it optimal for space-constrained, single-cell, ultra-low-power portable systems where battery longevity is critical.
Availability
NCP1400ASN50T1 is available at Aetrix Electronics and suitable for white LED lighting, low-power microcontroller supply, digital camera flash support, and portable audio codec bias requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for NCP1400ASN50T1 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, with leadership in power management, analog, and sensor technologies.
The NCP1400A series was designed specifically for micropower, single- or dual-cell portable applications - prioritizing ultra-low startup voltage, minimal external components, and robust DCM operation in space- and battery-limited devices.
FAQ
What is the minimum input voltage required for NCP1400ASN50T1 to start regulating?
The NCP1400ASN50T1 has a typical minimum startup voltage of 0.8 V, with a maximum of 0.95 V across temperature. This allows reliable operation from nearly depleted single-cell alkaline, NiMH, or Li-ion batteries. Startup voltage decreases by −1.6 mV/°C over −40°C to +85°C, so cold-temperature designs should verify margin at −40°C.
Can NCP1400ASN50T1 operate with an input voltage below 0.8 V?
No - the NCP1400ASN50T1 will not initiate regulation below its minimum startup voltage (0.8 V typ). However, once started, it can continue operating down to 0.2 V (minimum hold voltage), sustaining output as the battery discharges further. Below 0.2 V, regulation ceases and output collapses.
What is the purpose of the NC pin (Pin 3) on NCP1400ASN50T1?
Pin 3 (NC) on the NCP1400ASN50T1 is a no-connect terminal with no internal bond wire or circuit connection. It must remain unconnected - neither grounded nor routed - to avoid mechanical stress or unintended coupling. The TSOP-5 package uses this pin position for mechanical symmetry and die alignment.
How does the CE pin behave when left floating on NCP1400ASN50T1?
When the CE pin is left floating, the internal 150 nA pull-up current source connects it to the OUT pin, pulling CE to ~5.0 V and enabling normal regulation. This default-enabled behavior simplifies designs where always-on operation is acceptable and eliminates the need for external pull-up resistors.
What inductor value is recommended for NCP1400ASN50T1 in a typical 5.0 V output application?
A 22 µH inductor is the recommended value for NCP1400ASN50T1 at 5.0 V output, as validated in the datasheet's efficiency and ripple plots (Figures 4, 7, 31). Inductors between 18 µH and 27 µH are acceptable; select low-DCR (<1.0 Ω) and saturation current >350 mA to ensure stable DCM operation and prevent core saturation.
NCP1400ASN50T1 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):
- 5V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 100mA (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
NCP1400ASN50T1 FAQ
1.How can I place an order for NCP1400ASN50T1 through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1400ASN50T1 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 NCP1400ASN50T1 reliable?
The price and inventory of NCP1400ASN50T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1400ASN50T1 is usually 5 days.
3.What payment methods are accepted for NCP1400ASN50T1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1400ASN50T1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1400ASN50T1?
NCP1400ASN50T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1400ASN50T1 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 NCP1400ASN50T1?
For technical support, including NCP1400ASN50T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1400ASN50T1 requirements.
6.How does Aetrix verify that NCP1400ASN50T1 is sourced from the original manufacturer or authorized distributors?
All NCP1400ASN50T1 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 NCP1400ASN50T1 meets industry standards.
7.What is the process for return or replacement of NCP1400ASN50T1?
All NCP1400ASN50T1 units undergo pre-shipment inspection (PSI). If there is an issue with NCP1400ASN50T1, 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 NCP1400ASN50T1 part is unused and in its original packaging.
Return procedure for NCP1400ASN50T1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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