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onsemi NCP1400ASN38T1G
- Part No.:
- NCP1400ASN38T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP1400ASN38T1G.pdf
- Description:
- IC REG BOOST 3.8V 100MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,869
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Product details
Overview
NCP1400ASN38T1G from onsemi is a fixed-frequency PWM step-up DC-DC switching regulator optimized for micropower battery-powered applications. It delivers up to 100 mA output current with 3.8 V regulated output, starts up from as low as 0.8 V input, operates down to 0.2 V, and integrates power MOSFET, oscillator, error amplifier, soft-start, and chip enable. It powers white LED torch lights and handheld instruments where ultra-low-voltage startup and minimal external components are critical.
For engineers reviewing the NCP1400ASN38T1G datasheet, pinout, applications, or equivalent options, key selection criteria include startup voltage (0.8 V), output regulation accuracy (±2.5%), TSOP-5 package footprint, CE-controlled shutdown (1.5 µA off-state current), and discontinuous-mode stability without external compensation.
Technical Context
The NCP1400ASN38T1G implements a voltage-mode PWM control architecture with an internal 180 kHz oscillator (±20% tolerance, 0.11%/°C tempco) and phase-compensated error amplifier enabling stable operation in discontinuous conduction mode. Its integrated 350 mA cycle-by-cycle current limit protects the internal MOSFET during overload or inductor saturation.
Startup and hold behavior is defined by dedicated thresholds: minimum startup voltage is 0.8 V (typ), decreasing −1.6 mV/°C over temperature; minimum hold voltage is 0.3 V (min). The CE pin features an internal 150 nA pull-up to OUT, allowing floating-enable operation, with defined enable (>0.9 V) and disable (<0.3 V) thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.8 V ±2.5% - factory-trimmed internal feedback network eliminates external resistors |
| Switching Frequency | 180 kHz (144–216 kHz range) - fixed-frequency PWM enables predictable EMI filtering and inductor sizing |
| Startup Voltage | 0.8 V (typ) - enables operation from single NiMH or deeply discharged Li-ion cells |
| Max Output Current | 100 mA - supports moderate-power loads like white LEDs or sensor interfaces |
| Quiescent Current | 44 µA (typ at 3.8 V) - minimizes battery drain in active boost mode |
| Shutdown Current | 0.6 µA (typ) - achieved via CE pin <0.3 V; extends shelf life of battery-powered devices |
| Operating Temp Range | −40°C to +85°C ambient - validated for industrial and portable consumer environments |
Pinout & Package
Package: TSOP-5 (Case 483), Pb-free, 3.0 mm × 1.5 mm × 1.0 mm profile, suitable for space-constrained portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CE | Chip Enable input | Logic-controlled shutdown: >0.9 V = enabled; <0.3 V = disabled; floating = enabled via internal 150 nA pull-up to OUT |
| 2 - OUT | Output voltage monitor & supply rail | Provides regulated 3.8 V output; also powers internal circuitry and serves as reference for CE pull-up |
| 3 - NC | No internal connection | Unbonded pad - must be left unconnected; no routing or thermal relief required |
| 4 - GND | Power and signal ground | Common return for input, output, and internal logic; requires low-impedance one-point grounding per layout guidelines |
| 5 - LX | Switch node | Drain of internal power MOSFET; connects externally to inductor and Schottky diode anode; handles peak currents up to 350 mA |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low startup voltage | 0.8 V enables use with single-cell alkaline/NiMH batteries even after significant discharge |
| Integrated power switch | On-die 350 mA current-limited MOSFET eliminates external high-side switch and simplifies BOM |
| Self-stabilizing compensation | Internal phase compensation ensures stability across full load and input range without external components |
| Soft-start circuit | Ramps output to ~1.5 V before regulation engages, preventing inrush current and improving startup under load |
| Pb-free & RoHS-compliant | TSOP-5 package meets global environmental compliance requirements for consumer and industrial shipments |
Applications
| White LED Torch Light | Handheld Instrument Power |
|---|---|
Use Scenario: Battery-powered flashlight using 1–2 AA/AAA cells driving multiple white LEDs in series. IC Role / Device Role / Timing Role: Step-up regulator generating stable 3.8 V to bias LED string while maintaining brightness across battery discharge curve. Use Value: 0.8 V startup preserves usable runtime from near-dead cells; 100 mA output sustains typical LED forward current without external driver. |
Use Scenario: Portable multimeter or data logger powered by coin cell or single alkaline battery. IC Role / Device Role / Timing Role: Primary DC-DC converter supplying regulated 3.8 V to microcontroller, ADC, and display backlight. Use Value: Micropower operation (44 µA IQ) extends battery life; TSOP-5 footprint saves board area in compact enclosures. |
| Personal Digital Assistant (PDA) | Digital Camera Backlight |
Use Scenario: Legacy PDA requiring 3.3–3.8 V rail for memory, touchscreen controller, and low-power CPU core. IC Role / Device Role / Timing Role: Secondary boost converter feeding system power domain from main battery bus. Use Value: Discontinuous-mode operation avoids sub-harmonic instability; CE pin allows software-controlled power gating during sleep modes. |
Use Scenario: Small-format digital camera using white LED array for LCD backlight illumination. IC Role / Device Role / Timing Role: Dedicated LED driver supply ensuring constant brightness independent of battery voltage sag. Use Value: Tight output tolerance (±2.5%) prevents visible flicker; low ripple (<20 mV at 10 mA) maintains display contrast uniformity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61022DRVR | Higher 2-MHz switching frequency; 1.8–5.5 V adjustable output; requires external feedback resistors | Better suited for compact designs needing higher efficiency above 100 mA or wider VIN range (0.3–5.5 V) | Select when board space permits smaller inductor/capacitor and design requires programmable output or higher light-load efficiency |
| MAX17222ELT+T | 0.4-V startup; 500-kHz fixed frequency; 120-mA output; integrated Schottky diode | Superior ultra-low-voltage capability but lacks CE shutdown and has tighter thermal limits (−40°C to +85°C only) | Prefer when operating below 0.6 V input is mandatory and CE control is not required |
Compared with TPS61022DRVR and MAX17222ELT+T, the NCP1400ASN38T1G offers factory-set 3.8 V output with zero external components for regulation, lowest bill-of-materials cost for fixed-output applications, and guaranteed CE-controlled shutdown - making it optimal for cost-sensitive, space-constrained, single-voltage portable systems.
Availability
NCP1400ASN38T1G is available at Aetrix Electronics and suitable for white LED torch lights, handheld instruments, PDAs, and digital camera backlights requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for NCP1400ASN38T1G 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, delivering silicon solutions for automotive, industrial, cloud, and intelligent edge applications.
The NCP1400ASN38T1G belongs to the NCP1400A micropower step-up regulator product line, designed specifically for ultra-low-voltage battery-powered portable equipment where minimal external components, extended runtime, and robust startup behavior are essential.
FAQ
What is the minimum input voltage required for NCP1400ASN38T1G to start regulating?
The NCP1400ASN38T1G has a typical minimum startup voltage of 0.8 V, with a maximum of 0.95 V across temperature. This allows reliable startup from a single NiMH cell (1.2 V nominal) even after deep discharge. The device continues operation down to 0.2 V input, sustaining regulation until the battery is fully depleted.
Does NCP1400ASN38T1G require external compensation components?
No, the NCP1400ASN38T1G includes an internally phase-compensated error amplifier optimized for stable operation in discontinuous conduction mode across its full input/output voltage and load range. No external compensation capacitors or resistors are needed - only four external components (inductor, diode, input cap, output cap) are required for full functionality.
How does the CE pin function on NCP1400ASN38T1G?
The CE pin on NCP1400ASN38T1G controls device enable/disable state: voltage ≥0.9 V enables regulation; voltage ≤0.3 V disables the IC, reducing quiescent current to 0.6 µA (typ); floating CE is pulled up to OUT via an internal 150 nA current source, defaulting to enabled. Voltages between 0.3 V and 0.9 V must be avoided to prevent undefined behavior.
What is the output voltage accuracy of NCP1400ASN38T1G over temperature?
The NCP1400ASN38T1G provides a 3.8 V output with ±2.5% initial accuracy at 25°C. Over the full operating temperature range (−40°C to +85°C), output voltage drift is characterized at ±150 ppm/°C, resulting in total variation within ±0.5% across temperature - sufficient for LED biasing and non-critical analog rails.
Can NCP1400ASN38T1G drive a 100 mA load continuously?
Yes, the NCP1400ASN38T1G is rated for up to 100 mA continuous output current at 3.8 V, assuming proper thermal design (e.g., adequate copper pour on GND and LX pads) and use of recommended external components (22 µH inductor, low-ESR 68 µF output capacitor). Efficiency remains >80% at 10 mA to 80 mA loads with 1.2 V input.
NCP1400ASN38T1G 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):
- 3.8V
- Voltage - Output (Min/Fixed):
- 3.8V
- 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
NCP1400ASN38T1G FAQ
1.How can I place an order for NCP1400ASN38T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1400ASN38T1G 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 NCP1400ASN38T1G reliable?
The price and inventory of NCP1400ASN38T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1400ASN38T1G is usually 5 days.
3.What payment methods are accepted for NCP1400ASN38T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1400ASN38T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1400ASN38T1G?
NCP1400ASN38T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1400ASN38T1G 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 NCP1400ASN38T1G?
For technical support, including NCP1400ASN38T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1400ASN38T1G requirements.
6.How does Aetrix verify that NCP1400ASN38T1G is sourced from the original manufacturer or authorized distributors?
All NCP1400ASN38T1G 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 NCP1400ASN38T1G meets industry standards.
7.What is the process for return or replacement of NCP1400ASN38T1G?
All NCP1400ASN38T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP1400ASN38T1G, 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 NCP1400ASN38T1G part is unused and in its original packaging.
Return procedure for NCP1400ASN38T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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