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NCP1034DR2G 100V High-Voltage Synchronous Buck PWM Controller Chip 2A Drive 500kHz SOIC-16
NCP1034DR2G Product Overview
The NCP1034DR2G is a high-voltage PWM controller from onsemi, designed for high-performance synchronous Buck DC-DC applications with input voltages up to 100V. Housed in a SOIC-16 (0.154", 3.90mm width) package, it drives a pair of external N-MOSFETs with a programmable switching frequency from 25kHz to 500kHz, allowing flexible tuning for efficiency and size. The NCP1034 utilizes a voltage-mode control architecture, and the output voltage can be precisely regulated using an internally trimmed 1.25V reference voltage, making it suitable for low-voltage applications. A synchronization feature allows the switching frequency to be set by an external source or to output a synchronization signal to multiple NCP1034 controllers, simplifying system-level filter design. The device provides user-programmable undervoltage lockout and hiccup current limit protection features for system-level safety during fault conditions. It is widely used in 48V non-isolated DC-DC converters, embedded telecom systems, networking and computing voltage regulators, and distributed point-of-load power architectures.
| Part number | NCP1034DR2G |
| Device Type | High-Voltage Synchronous Buck PWM Controller |
| Topology | Synchronous Buck (Step-Down) |
| Control Mode | Voltage Mode |
| Input Voltage Range | Up to 100V |
| Supply Voltage (Vcc) | 8V ~ 75V |
| Output Drive Capability | 2 A |
| Switching Frequency | 25 kHz ~ 500 kHz (Programmable) |
| Feedback Reference | 1.25V ±1.5% (Across Temperature) |
| Max Duty Cycle | 80% |
| Synchronous Rectifier | Yes |
| Clock Sync | Yes (External Frequency Synchronization) |
| Soft-Start | Programmable with Prebiased Load Capability |
| Protections | Programmable UVLO, Hiccup Current Limit, Programmable OCP |
| Control Features | Current Limit, Enable, Frequency Control, Soft Start |
| Number of Outputs | 1 |
| Output Phases | 1 |
| Package | SOIC-16 (0.154", 3.90mm Width) |
| Dimensions | 10mm × 4mm × 1.5mm |
| Mounting Type | Surface Mount |
| Operating TJ | -40℃ ~ +125℃ |
NCP1034DR2G Applications
48V Non-Isolated DC-DC Converters
Embedded Telecom Systems
Networking and Computing Voltage Regulators
Distributed Point of Load (POL) Power Architectures
General High Voltage DC-DC Converters
Industrial and Telecom Power Supply Modules
FAQ
Q: What is the input voltage range?
A: The NCP1034 supports input voltages up to 100V, suitable for 48V or 60V telecom bus applications. The device supply voltage (Vcc) range is 8V to 75V.
Q: What switching frequencies are supported?
A: The switching frequency is programmable from 25kHz to 500kHz via an external resistor, allowing designers to trade off between efficiency and size.
Q: What protection features are available?
A: Protections include user-programmable undervoltage lockout (UVLO), hiccup current limit using MOSFET RDS(on) sensing, and programmable overcurrent protection for system-level safety in the event of a fault.
Q: Does it support multi-controller synchronization?
A: Yes. The external synchronization feature allows the switching frequency to be set by an external source or output a sync pulse to multiple NCP1034 controllers for simplified system-level filter design.
Q: What is the output drive capability?
A: The output drive capability is 2A, driving a pair of external N-MOSFETs, supporting larger size FETs for increased efficiency.
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- Part number:
- NCP1034DR2G
- Type:
- High-Voltage Synchronous Buck PWM Controller
- Topology:
- Voltage Mode
- Supply Voltage:
- 8V ~ 75V
- Output Drive Capability:
- 2A
- Max Duty Cycle:
- 80%
- Package:
- SOIC-16
- Operating TJ:
- -40°C ~ +125°C
