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onsemi NCP1532MUAATXG
- Part No.:
- NCP1532MUAATXG
- Manufacturer:
- onsemi
- Package:
- 10-UFDFN Exposed Pad
- Datasheet:
-
NCP1532MUAATXG.pdf
- Description:
- IC REG BUCK ADJ 1.6A DL 10UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,700
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Product details
Overview
NCP1532MUAATXG from onsemi is a dual-channel synchronous step-down DC-DC converter optimized for portable multimedia applications powered by single-cell Li-ion or 3-cell alkaline/NiCd/NiMH batteries. It delivers up to 1.0 A per channel (1.6 A total), operates at 2.25 MHz switching frequency with 180° out-of-phase operation, supports adjustable output voltages from 0.9 V to 3.3 V, and integrates soft-start, cycle-by-cycle current limiting, and thermal shutdown protection - enabling compact, high-efficiency core/I/O voltage regulation in smartphones and digital cameras.
For engineers reviewing the NCP1532MUAATXG datasheet, pinout, applications, or equivalent options, key selection criteria include its dual-output 2.25 MHz current-mode architecture, 50 µA quiescent current in PFM mode, MODE/SYNC pin configurable Eco/PWM/external sync operation, and UDFN10 3×3 mm package with exposed thermal pad requiring system ground connection.
Technical Context
The NCP1532MUAATXG implements a constant-frequency, current-mode buck architecture with integrated P-channel high-side and N-channel low-side MOSFETs (RONHS = 400 mΩ, RONLS = 300 mΩ). Each channel uses an internal 0.6 V reference and external resistor divider for output programming, with independent enable (EN1/EN2) and shared MODE/SYNC control for PFM/PWM mode selection or external clock synchronization up to 3.0 MHz.
It features 180° out-of-phase switching between channels to minimize input ripple, automatic PWM/PFM transition based on load, and integrated protection including undervoltage lockout (2.4 V typ), short-circuit current limiting (1.6 A peak), and thermal shutdown (180°C trip, 140°C hysteresis). The POR open-drain output provides power-on reset signaling with 116 ms delay and 89% regulation threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports single-cell Li-ion (fully charged ~4.2 V) and 3-cell alkaline (~4.5 V fresh) without external LDO pre-regulation. |
| Output Current Capability | 1.0 A per channel, 1.6 A total - enables simultaneous core (e.g., 1.2 V @ 600 mA) and I/O (e.g., 3.3 V @ 600 mA) rail generation. |
| Switching Frequency | 2.25 MHz (±0.45 MHz) - allows use of 2.2 µH inductors and 10 µF ceramic capacitors, reducing solution footprint vs. 500 kHz converters. |
| Feedback Reference Voltage | 0.6 V ±1% - sets output via external resistor divider (VOUT = 0.6 × (1 + R1/R2)), enabling precise 0.9–3.3 V adjustment with <±3% total accuracy. |
| Quiescent Current | 50 µA (typ) in PFM no-load mode - extends battery life in standby states of portable devices without compromising startup time. |
| Efficiency Peak | 97% (typ) at mid-load - achieved via synchronous rectification and optimized gate drive, critical for thermal management in sealed handheld enclosures. |
| Thermal Shutdown Threshold | 180°C (typ), with 40°C hysteresis - protects silicon integrity during sustained high-power operation; restarts after junction cools to ~140°C. |
Pinout & Package
The NCP1532MUAATXG is housed in a space-saving, ultra-low-profile 3×3×0.55 mm UDFN10 package (Case 506AT, MU suffix), featuring an exposed thermal pad (Pin 11) that must be soldered to system ground for thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB1 / FB2 | Analog Input | Feedback nodes for output 1 and 2; connect to resistor dividers to set VOUT1/VOUT2; referenced to internal 0.6 V bandgap. |
| EN1 / EN2 | Digital Input | Independent enable controls (active HIGH ≥1.2 V); disable respective channel to reduce quiescent current to 0.3 µA. |
| VIN | Analog/Power Input | Main power input for both channels and internal circuitry; requires 10 µF ceramic decoupling capacitor placed adjacent to pin. |
| SW1 / SW2 | Analog Output | Switch node connections to external inductors; carry high di/dt currents - routing must minimize loop area to reduce EMI. |
| GND | Analog Ground | Reference for analog blocks; connect to system ground plane with low-ESR 10 µF capacitor to stabilize feedback and reference circuits. |
| MODE/SYNC | Digital Input / Analog Input | Multi-function pin: GND = auto PFM/PWM; VIN = forced PWM; external 2.25 MHz clock = synchronized PWM with 0° phase alignment. |
| POR | Digital Output | Open-drain Power-On Reset signal; asserts LOW when either output falls below 89% of target; requires ~500 kΩ pull-up to VIN or VOUT. |
| Exposed Pad | Power Ground | Thermal and electrical ground for NFET power stage; must be soldered to PCB ground plane with multiple vias for heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diodes, reducing conduction loss and improving efficiency by >5% vs. asynchronous designs at 500 mA load. |
| 180° out-of-phase switching | Halves input ripple current magnitude vs. in-phase operation, allowing smaller input capacitors and reducing battery stress in portable systems. |
| Automatic PFM/PWM mode transition | Reduces quiescent current to 50 µA at light loads while maintaining <8 mV output ripple and fast transient response under load steps. |
| Integrated soft-start | 230–350 µs ramp time prevents inrush current spikes during power-up, protecting input source and avoiding brownout in battery-powered systems. |
| External clock synchronization | Accepts 2.25–3.0 MHz external clock on MODE/SYNC pin to align switching edges with other converters, minimizing beat frequencies and EMI peaks. |
Applications
| Smartphone Core & I/O Power | Digital Camera Dual-Rail Supply |
|---|---|
Use Scenario: Simultaneous powering of application processor core (1.1 V) and memory I/O (3.3 V) from single Li-ion cell in slim smartphone form factor. IC Role / Device Role / Timing Role: Dual-output buck regulator providing tightly regulated, low-noise, thermally efficient DC-DC conversion with minimal external components. Use Value: Enables 3×3 mm solution size, extends battery runtime via 97% peak efficiency and 50 µA PFM quiescent current, and reduces EMI through 180° phase interleaving. |
Use Scenario: Supplying image sensor analog bias (2.8 V) and digital logic (1.8 V) in compact digital still camera with strict thermal envelope. IC Role / Device Role / Timing Role: Compact dual-channel DC-DC converter delivering stable, low-ripple outputs with independent enable control for power sequencing. Use Value: Achieves <±3% output accuracy across temperature, supports fast load transients (<85 mV deviation), and maintains regulation down to 2.7 V input during battery discharge. |
| Portable Audio System Voltage Management | Wireless Modem Baseband Power |
Use Scenario: Generating clean 1.2 V core and 3.3 V interface rails for Bluetooth/Wi-Fi SoC in battery-powered headphones or speakers. IC Role / Device Role / Timing Role: High-frequency dual buck converter operating in forced PWM mode (via MODE/SYNC = VIN) to suppress switching noise near sensitive audio paths. Use Value: Delivers <8 mVpp output ripple and excellent line/load transient response, eliminating audible switching artifacts while maintaining 90%+ efficiency. |
Use Scenario: Powering baseband processor and RF front-end in DSL/wireless modem where EMI compliance and thermal density are critical. IC Role / Device Role / Timing Role: Synchronized dual buck regulator (MODE/SYNC driven by system clock) to eliminate subharmonic interference with RF bands. Use Value: Enables deterministic EMI spectrum placement, reduces filtering component count, and ensures stable operation under dynamic load profiles typical of burst-mode data transmission. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130ARGTR | Single-output 3-A buck; higher current per channel but no dual independent outputs; 2.5-MHz fixed frequency; no PFM mode. | Requires two ICs to match NCP1532MUAATXG's dual-rail capability; better suited for high-current single-rail systems. | Select when needing >1 A per rail or tighter output voltage tolerance (±1% vs. ±3%), but accept larger BOM and layout area. |
| RT8070ZSP | Dual-output buck (1.2 A/1.2 A); 1.5-MHz switching; no external sync capability; lower quiescent current (22 µA) but no POR output. | Lacks power-on reset signaling and external clock synchronization - limits use in systems requiring precise power sequencing or EMI coordination. | Prefer for cost-sensitive, low-quiescent applications where sync and POR are non-critical, and 1.5-MHz operation suffices for size targets. |
Compared with TPS62130ARGTR and RT8070ZSP, the NCP1532MUAATXG uniquely combines dual independent outputs, 2.25 MHz operation with 180° phase shift, MODE/SYNC-configurable Eco/PWM/sync modes, and integrated POR - making it optimal for space-constrained portable systems demanding coordinated multi-rail power with EMI control and robust power sequencing.
Availability
NCP1532MUAATXG is available at Aetrix Electronics and suitable for smartphone power management, digital camera dual-rail supply, and portable audio system voltage regulation requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for NCP1532MUAATXG 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 manufacturer specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and portable electronics.
The NCP1532MUAATXG belongs to onsemi's high-frequency DC-DC converter product line, designed specifically for battery-powered portable multimedia devices requiring compact, efficient, and thermally robust dual-voltage regulation from single-cell sources.
FAQ
What is the recommended input capacitor for NCP1532MUAATXG?
The NCP1532MUAATXG requires a 10 µF low-ESR ceramic capacitor (e.g., Murata GRM21BR61A106) placed as close as possible to the VIN pin to suppress high-frequency switching noise and limit input current ripple. A 10 V rated capacitor is recommended to maintain capacitance across the full 2.7–5.5 V input range and avoid DC bias derating effects.
How does the MODE/SYNC pin affect NCP1532MUAATXG operation?
The MODE/SYNC pin configures three distinct operating modes for the NCP1532MUAATXG: grounded enables automatic PFM/PWM switching for best light-load efficiency; pulled to VIN forces continuous PWM mode for lowest noise and ripple; and driven by a 2.25–3.0 MHz external clock synchronizes both channels to that source with 0° phase alignment, reducing beat frequencies in multi-converter systems.
Can NCP1532MUAATXG operate with only one channel enabled?
Yes, the NCP1532MUAATXG supports independent channel control: pulling EN1 low disables Channel 1 while Channel 2 remains active, and vice versa. The POR output reflects regulation status of only enabled channels - if only one channel is active, POR asserts only when that output drops below 89% of its target voltage.
What is the purpose of the exposed pad on the NCP1532MUAATXG UDFN10 package?
The exposed pad (Pin 11) on the NCP1532MUAATXG serves as the power ground connection for the NFET power stage and is critical for thermal dissipation. It must be soldered to the PCB ground plane using multiple thermal vias to achieve the specified 40°C/W junction-to-board thermal resistance and prevent thermal shutdown under sustained 1.6 A total load.
How is output voltage accuracy affected by external resistor selection in NCP1532MUAATXG?
Output voltage accuracy of the NCP1532MUAATXG depends directly on the tolerance and temperature coefficient of the external feedback resistors. With a 0.6 V internal reference, a 1% resistor tolerance contributes ~1% error to VOUT; using 0.1% precision resistors and keeping R2 between 100 kΩ and 600 kΩ minimizes noise susceptibility and achieves total output error within ±3% over temperature and line/load conditions.
NCP1532MUAATXG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 10-UFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 3.3V
- Current - Output:
- 1.6A
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-UDFN (3x3)
NCP1532MUAATXG FAQ
1.How can I place an order for NCP1532MUAATXG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP1532MUAATXG 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 NCP1532MUAATXG reliable?
The price and inventory of NCP1532MUAATXG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1532MUAATXG is usually 5 days.
3.What payment methods are accepted for NCP1532MUAATXG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1532MUAATXG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP1532MUAATXG?
NCP1532MUAATXG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP1532MUAATXG 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 NCP1532MUAATXG?
For technical support, including NCP1532MUAATXG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1532MUAATXG requirements.
6.How does Aetrix verify that NCP1532MUAATXG is sourced from the original manufacturer or authorized distributors?
All NCP1532MUAATXG 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 NCP1532MUAATXG meets industry standards.
7.What is the process for return or replacement of NCP1532MUAATXG?
All NCP1532MUAATXG units undergo pre-shipment inspection (PSI). If there is an issue with NCP1532MUAATXG, 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 NCP1532MUAATXG part is unused and in its original packaging.
Return procedure for NCP1532MUAATXG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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