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onsemi NCP700BSN28T1G
- Part No.:
- NCP700BSN28T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP700BSN28T1G.pdf
- Description:
- IC REG LINEAR 2.8V 200MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,757
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Product details
Overview
NCP700BSN28T1G from onsemi is a 200 mA ultra-low-noise, high-PSRR LDO regulator optimized for RF power amplifier supply in battery-powered portable devices. It delivers 2.8 V output with ±2.5% accuracy, 120 mV typical dropout at 200 mA, 10 µVRMS output noise (with 100 nF BYP capacitor), and 82 dB PSRR at 1 kHz - enabling clean biasing of sensitive RF front-end stages in smartphones and cellular handsets.
For engineers reviewing the NCP700BSN28T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its BiCMOS process enabling simultaneous low noise and low ground current (70 µA no-load), active discharge circuit for fast turn-off, EN-controlled enable/disable functionality, and stability with 1 µF ceramic output capacitors in space-constrained WDFN6 packaging.
Technical Context
The NCP700BSN28T1G employs a BiCMOS architecture integrating bipolar elements for ultra-low noise and high PSRR with CMOS for sub-100 µA quiescent current across load range. Its internal bandgap reference is accessible via the BYP pin, allowing external 10–100 nF capacitors to suppress noise generation at source before amplification by the error amplifier and PMOS pass device.
It features logic-level enable control (0.4 V low / 1.2 V high threshold), internal 5 MΩ pull-down on EN, active discharge path (1 kΩ) to rapidly collapse VOUT when disabled, thermal shutdown (150 °C trip, 135 °C reset), and current limiting (310 mA typ) with indefinite short-circuit tolerance - all implemented without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2.5% over −40 °C to +125 °C junction temperature - ensures stable RF PA bias under thermal stress. |
| Max Output Current | 200 mA continuous - sufficient for mid-power RF power amplifiers in 4G/5G handset front-ends. |
| Dropout Voltage | 120 mV typical at 200 mA - enables operation from Li-ion battery down to ~3.0 V while maintaining regulation. |
| Output Noise | 10 µVRMS (10 Hz–100 kHz) with 100 nF BYP cap - meets stringent spectral purity requirements for LTE/WCDMA transmit chains. |
| PSRR | 82 dB at 1 kHz - rejects switching noise from adjacent DC-DC converters feeding baseband or digital subsystems. |
| Ground Current | 70 µA at no load; 75 µA at 200 mA - extends battery life in always-on RF receive paths and standby modes. |
| Enable Threshold | 0.4 V (max) low / 1.2 V (min) high - compatible with standard GPIOs and low-voltage logic without level-shifting. |
Pinout & Package
Package: WDFN6 (1.5 mm × 1.5 mm, 0.5 mm height, Case 511BJ), Pb-free, moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 2.5 V to 5.5 V input; requires ≥1 µF ceramic decoupling to GND for line transient immunity. |
| 2 (GND) | Power ground reference | Primary return path for IN, OUT, and BYP; must be low-inductance connection to PCB ground plane. |
| 3 (OUT) | Regulated output | Delivers 2.8 V to load; stable with ≥1 µF X5R/X7R ceramic capacitor; supports active discharge via internal 1 kΩ path. |
| 4 (EN) | Logic enable input | Active-high control: <0.4 V disables (IDIS ≤ 1 µA), >1.2 V enables; internal 5 MΩ pull-down ensures default-off state. |
| 5 (NC) | No-connect terminal | Not bonded internally; must remain unconnected per design - no routing or soldering allowed. |
| 6 (BYP) | Noise reduction node | Direct access to internal bandgap reference; connect 10–100 nF capacitor to GND to reduce output noise by up to 35%. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 10 µVRMS (10 Hz–100 kHz) with 100 nF BYP cap - enables direct powering of GaAs/GaN RF PAs without additional filtering. |
| High PSRR at RF frequencies | 82 dB @ 1 kHz, >60 dB up to 100 kHz - suppresses ripple from buck converters sharing same battery rail. |
| BiCMOS process technology | Combines bipolar low-noise gain stages with CMOS low-IQ pass elements - achieves 70 µA no-load current without sacrificing noise performance. |
| Active discharge circuit | 1 kΩ internal discharge path activated on EN low - reduces VOUT decay time to <1 ms with 10 µF load capacitance, critical for fast power sequencing. |
| Stable with minimal output capacitance | Works with 1 µF ceramic COUT (X5R/X7R) - eliminates need for large tantalum or polymer caps, saving board area in thin mobile designs. |
Applications
| Cellular RF Power Amplifier Supply | Noise-Sensitive Analog Signal Chain |
|---|---|
Use Scenario: Providing clean, regulated 2.8 V bias to LTE/WCDMA power amplifier modules in smartphone transceivers. IC Role / Device Role / Timing Role: Primary LDO supplying PA collector/drain rail; rejects switching noise from PMIC DC-DC converters. Use Value: 10 µVRMS noise and 82 dB PSRR prevent AM-to-PM distortion and adjacent channel leakage ratio (ACLR) degradation in transmit path. | Use Scenario: Powering high-resolution ADCs, DACs, or RF mixers in portable instrumentation or audio codecs. IC Role / Device Role / Timing Role: Low-noise analog supply rail decoupled from noisy digital domains; BYP pin allows fine-tuning of noise floor. Use Value: 2.8 V output with ±2.5% accuracy and <120 mV dropout maintains SNR >90 dB even as battery discharges from 4.2 V to 3.0 V. |
| Battery-Powered Portable Devices | Thermally Constrained IoT Edge Nodes |
Use Scenario: Regulating main system voltage for GPS receivers, Bluetooth SoCs, or Wi-Fi coexistence modules in wearables. IC Role / Device Role / Timing Role: Always-on LDO with 70 µA no-load IQ; EN pin enables full system sleep mode with <1 µA disable current. Use Value: Sub-100 µA quiescent current extends coin-cell or small Li-ion battery life beyond 12 months in low-duty-cycle sensing applications. | Use Scenario: Supplying sensor interface ICs in sealed industrial IoT nodes where heatsinking is impossible. IC Role / Device Role / Timing Role: Thermally robust LDO with 150 °C shutdown and 135 °C hysteresis; operates continuously at 125 °C junction temperature. Use Value: 185 °C/W θJA (WDFN6) combined with thermal shutdown prevents latch-up or parametric drift in enclosed enclosures up to 85 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B282MR-G | 200 mA, 2.8 V fixed, 120 mV dropout, 25 µVRMS noise (no BYP pin), 65 dB PSRR @ 1 kHz | Lacks BYP pin for noise tuning; higher noise limits use in ultra-sensitive RF PA biasing | Select when cost sensitivity outweighs need for <12 µVRMS noise; verify PSRR margin against specific DC-DC switching frequency. |
| Richtek RT9013-28GB | 300 mA, 2.8 V fixed, 250 mV dropout, 45 µVRMS noise, no BYP, 60 dB PSRR @ 1 kHz | Higher dropout and noise; lacks active discharge and thermal hysteresis | Use only in non-RF applications with ample input headroom (>3.5 V) and relaxed noise requirements (e.g., MCU core supply). |
Compared with XC6210B282MR-G and RT9013-28GB, the NCP700BSN28T1G uniquely combines sub-12 µVRMS noise (via BYP), 82 dB PSRR, and active discharge in a 1.5 mm × 1.5 mm package - making it the only option qualified for high-efficiency, spectrally pure RF PA bias in modern 4G/5G handsets.
Availability
NCP700BSN28T1G is available at Aetrix Electronics and suitable for cellular telephony, portable instrumentation, and battery-supplied IoT edge nodes requiring stable component supply, long-term lifecycle support, and guaranteed Pb-free compliance.
Supply support for NCP700BSN28T1G 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 is a global semiconductor leader delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP700B series is designed specifically for noise-critical RF and analog power delivery in portable electronics - emphasizing ultra-low noise, high PSRR, minimal quiescent current, and compact packaging for space-constrained mobile platforms.
FAQ
What is the maximum input voltage rating for the NCP700BSN28T1G?
The NCP700BSN28T1G has an absolute maximum input voltage rating of 6 V. Operation above this level risks permanent damage. For reliable continuous operation, the recommended input voltage range is 2.5 V to 5.5 V - ensuring proper regulation across full Li-ion battery discharge (4.2 V → 3.0 V) while maintaining 120 mV dropout margin at 200 mA load.
How does the BYP pin function in the NCP700BSN28T1G?
The BYP pin in the NCP700BSN28T1G provides direct access to the internal bandgap reference node - the dominant source of output noise. Connecting a 10–100 nF capacitor from BYP to GND shunts high-frequency noise before amplification by the error amplifier and PMOS pass device, reducing integrated output noise from 15 µVRMS to 10 µVRMS (typical) for the NCP700BSN28T1G.
Does the NCP700BSN28T1G require an external output capacitor, and what type is recommended?
Yes, the NCP700BSN28T1G requires an external output capacitor for stability and transient response. onsemi specifies ≥1 µF X5R or X7R ceramic capacitor (1206 or smaller) on the OUT pin. Larger values (e.g., 4.7 µF) further improve load transient performance but are not required. Tantalum or aluminum electrolytic capacitors are not recommended due to ESR and reliability concerns.
What is the purpose of the NC pin on the NCP700BSN28T1G WDFN6 package?
Pin 5 of the NCP700BSN28T1G WDFN6 package is designated NC (No Connect) - it is not bonded to any internal die structure and serves no electrical function. This pin must remain unconnected on the PCB; routing traces to it or applying solder paste may cause assembly defects or unintended parasitic coupling. The NC designation is confirmed in the official onsemi datasheet pin function table.
Can the NCP700BSN28T1G be used without connecting the EN pin?
Yes, the NCP700BSN28T1G can operate without external EN control: tie the EN pin directly to the IN pin to enable permanent operation. This leverages the internal 5 MΩ pull-down resistor to ensure startup, and avoids floating-node risk. However, doing so forfeits power sequencing capability, active discharge, and <1 µA disable-mode current - critical for battery life in portable systems with dynamic power states.
NCP700BSN28T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.205V @ 200mA
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 110 µA
- Current - Supply (Max):
- 130 µA
- PSRR:
- 82dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP700BSN28T1G FAQ
1.How can I place an order for NCP700BSN28T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP700BSN28T1G 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 NCP700BSN28T1G reliable?
The price and inventory of NCP700BSN28T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP700BSN28T1G is usually 5 days.
3.What payment methods are accepted for NCP700BSN28T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP700BSN28T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP700BSN28T1G?
NCP700BSN28T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP700BSN28T1G 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 NCP700BSN28T1G?
For technical support, including NCP700BSN28T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP700BSN28T1G requirements.
6.How does Aetrix verify that NCP700BSN28T1G is sourced from the original manufacturer or authorized distributors?
All NCP700BSN28T1G 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 NCP700BSN28T1G meets industry standards.
7.What is the process for return or replacement of NCP700BSN28T1G?
All NCP700BSN28T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP700BSN28T1G, 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 NCP700BSN28T1G part is unused and in its original packaging.
Return procedure for NCP700BSN28T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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