Specifications
| Type | Description |
|---|---|
| Part Number | NCP1605 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | SOIC-16, D suffix, case 751B |
| Component Type | Power_IC |
| Operating mode | Fixed frequency DCM or Critical Conduction Mode; condition: Power factor correction operation |
| Maximum switching frequency | 250 kHz; condition: General feature |
| VCC operating range | 10 to 20 V; condition: General feature |
| Gate drive source current capability | 500 mA; condition: VPin10 = 0 V |
| Gate drive sink current capability | 800 mA; condition: VPin10 = 10 V |
| Gate output rise time | 40 ns typ; condition: CL = 1 nF, from 1 V to 10 V |
| Gate output fall time | 20 ns typ; condition: CL = 1 nF, from 10 V to 1 V |
| Gate driver source resistance | 15 typ, 25 max ohm; condition: IPin10 = 100 mA |
| Gate driver sink resistance | 7 typ, 15 max ohm; condition: IPin10 = 100 mA |
| Voltage reference | 2.425 min, 2.500 typ, 2.575 max V; condition: NCP1605/A |
| Voltage reference | 2.430 min, 2.500 typ, 2.550 max V; condition: NCP1605B |
| Error amplifier current capability | +/-20 uA typ; condition: VCC = 16 V, VHV = 50 V |
| Error amplifier gain | 100 min, 200 typ, 300 max uS; condition: VCC = 16 V, VHV = 50 V |
| Feedback pin bias current | -500 min, 500 max nA; condition: Pin 4, VPin4 = VREF |
| VCONTROL maximum clamp voltage | 3.6 V typ; condition: VPin4 = 2 V |
| VCONTROL minimum voltage | 0.6 V typ; condition: VPin4 = 3 V |
| Output low detect threshold ratio | 95.0 min, 95.5 typ, 96.0 max % of VREF; condition: VOUT low detect threshold / VREF |
| Shutdown threshold | 2.375 min, 2.500 typ, 2.625 max V; condition: Pin 13 shutdown |
| Overvoltage protection threshold | 2.425 min, 2.500 typ, 2.575 max V; condition: OVP/UVP pin |
| Overvoltage threshold ratio | 99.5 min, 100.0 typ, 100.5 max % of VREF; condition: VOVP / VREF |
| Undervoltage protection threshold ratio | 8 min, 12 typ, 16 max % of VREF; condition: VUVP / VREF |
| Ramp source current | 54 min, 60 typ, 69 max uA; condition: Pin 7, VPin4 = 1.00 V, TJ = 0°C to +125°C |
| Ramp source current | 156 min, 182 typ, 214 max uA; condition: Pin 7, VPin4 = 1.75 V |
| Ramp source current | 313 min, 370 typ, 428 max uA; condition: Pin 7, VPin4 = 2.50 V |
| Fixed-frequency clamp voltage | 5 V typ; condition: Pin 7, VPin4 = VPin2 = 2 V and VPin6 = 0 V |
| CRM clamp voltage | 0.9 min, 1.0 typ, 1.1 max V; condition: Pin 7, VPin4 = 0 V, VPin2 = 2 V and VPin6 = 1 V |
| Minimum on-time delay | 90 typ, 200 max ns; condition: VPin7 > 5 V to DRV low |
| Internal timing capacitance | 15 typ, 25 max pF; condition: Pin 7 varying from 0 to 1 V |
| Ramp sink current | 10 mA typ; condition: Pin 7, drive low, VPin7 = 1 V |
| Overcurrent protection threshold | 230 min, 250 typ, 265 max uA; condition: Current sense block, Pin 5 current |
| Overcurrent propagation delay | 100 typ, 200 max ns; condition: IPin5 > 250 uA to DRV low |
| Current sense transfer ratio | 99 min, 108 typ, 117 max %; condition: IPin6/IPin5 at IPin5 = 10 uA |
| Current sense transfer ratio | 98 min, 101 typ, 103 max %; condition: IPin6/IPin5 at IPin5 = 200 uA |
| Zero-current detection comparator threshold | 50 min, 100 typ, 200 max mV; condition: Pin 6 comparator |
| Zero-current detection delay | 120 typ, 240 max ns; condition: VPin6 < VZCD to DRV high |
| Standby mode threshold | 280 min, 310 typ, 340 max mV; condition: VPin1 falling |
| Standby detection hysteresis | 25 min, 30 typ, 50 max mV; condition: Standby input |
| Oscillator charge current | 90 min, 100 typ, 110 max uA; condition: TJ = 0°C to +125°C |
| Oscillator discharge current | 90 min, 100 typ, 110 max uA; condition: TJ = 0°C to +125°C |
| Synchronization upper threshold | 3.0 V typ; condition: OSC/SYNC comparator |
| Synchronization lower threshold | 2.0 V typ; condition: OSC/SYNC comparator |
| Synchronization comparator swing | 0.9 min, 1.0 typ, 1.1 max V; condition: Vsync_H - Vsync_L |
| Minimum synchronization pulse width | 500 ns max; condition: Pulse detection |
| pfcOK low voltage | 60 typ, 120 max mV; condition: Pin 12, VPin13 = 5 V, 250 uA sunk by Pin 12 |
| pfcOK high voltage | 4.7 min, 5.0 typ, 5.3 max V; condition: NCP1605/A, VPin13 = 0 V, VPin3 = 5 V, 250 uA sourced by Pin 12 |
| pfcOK/REF5V current capability | 5.0 min, 10 typ mA; condition: Pin 12 reference output |
| Brown-out rising threshold | 0.9 min, 1.0 typ, 1.1 max V; condition: NCP1605/A, VPin2 rising |
| Brown-out falling threshold | 0.45 min, 0.50 typ, 0.55 max V; condition: NCP1605/A, VPin2 falling |
| Thermal shutdown threshold | 155°C typ; condition: Thermal shutdown |
| Thermal shutdown hysteresis | 15°C typ; condition: Thermal shutdown |
| VCC turn-on threshold | 14 min, 15 typ, 16 max V; condition: NCP1605, VCC rising |
| VCC turn-on threshold | 9.5 min, 10.5 typ, 11.5 max V; condition: NCP1605A, VCC rising |
| VCC turn-on threshold | 14.2 min, 15 typ, 15.55 max V; condition: NCP1605B, VCC rising |
| Minimum operating voltage after turn-on | 8.0 min, 9.0 typ, 10 max V; condition: NCP1605/A |
| Minimum operating voltage after turn-on | 8.6 min, 9.0 typ, 9.35 max V; condition: NCP1605B |
| Startup current source turn-on threshold | 5.5 min, 7.0 typ, 8.0 max V; condition: VCC threshold below which startup current source turns on |
| Logic reset VCC level | 2.0 min, 4.0 typ, 5.0 max V; condition: VCC logic reset |
| High-voltage startup current source | 5.0 min, 12 typ, 20 max mA; condition: NCP1605/A, current sunk by Pin 16, VCC = 13.5 V |
| Startup charge current | 5.0 min, 12 typ, 20 max mA; condition: NCP1605/A, current flowing out of VCC pin, VCC = 13.5 V |
| High-voltage current source | 0.5 typ, 1.0 max mA; condition: NCP1605/A, VCC = 0 V |
| Operating supply current, no switching | 2.5 typ, 5.0 max mA; condition: VCC = 16 V, no load, no switching |
| Operating supply current, switching | 2.0 min, 3.5 typ, 7.0 max mA; condition: VCC = 16 V, no load, switching |
| Off mode supply current | 310 min, 570 typ, 780 max uA; condition: VCC = 16 V, Pin 2 grounded |
| Latched-off mode supply current | 310 min, 550 typ, 750 max uA; condition: VCC = 13.5 V and VPin13 = 5 V |
| Power supply input absolute maximum | -0.3 to +20 V; condition: Pin 11 VCC |
| VCC transient absolute maximum | -0.3 to +25 V; condition: Pin 11, maximum transient current 100 mA |
| High-voltage pin absolute maximum | -0.3 to 600 V; condition: Pin 16 HV |
| Maximum power dissipation | 550 mW; condition: TA = 70°C |
| Thermal resistance junction-to-air | 145°C/W; condition: SOIC-16 package |
| Operating junction temperature range | -55 to +125°C; condition: Device operation |
| Maximum junction temperature | 150°C; condition: Absolute maximum rating |
| Storage temperature range | -65 to +150°C; condition: Absolute maximum rating |
| Lead soldering temperature | 300°C; condition: 10 s soldering |
| ESD rating HBM | 2000 V; condition: All pins except HV, JEDEC JESD22 Method A114E |
| ESD rating MM | 200 V; condition: All pins except HV, JEDEC JESD22 Method A115A |
| Datasheet Status | request_only |
Product Overview
The NCP1605 is a Texas Instruments Power_Management controller for power factor correction operation. It operates in fixed-frequency discontinuous conduction mode or Critical Conduction Mode and supports a maximum switching frequency of 250 kHz. The device uses a 10 to 20 V VCC operating range and includes a high-voltage startup path associated with the HV pin.
Gate-drive parameters include 500 mA source capability at VPin10 = 0 V, 800 mA sink capability at VPin10 = 10 V, 40 ns typical rise time, and 20 ns typical fall time with a 1 nF load. The control functions include voltage-reference regulation, error-amplifier behavior, overvoltage and undervoltage protection ratios, ramp generation, oscillator synchronization, zero-current detection, standby detection, and current-sense transfer characteristics.
The package is SOIC-16, D suffix, case 751B. Assembly and operating limits include 550 mW maximum power dissipation at TA = 70°C, 145°C/W junction-to-air thermal resistance, -55 to +125°C operating junction temperature range, and 300°C lead soldering temperature for 10 seconds.
Key Features
- Fixed-frequency DCM or Critical Conduction Mode PFC operation
- Maximum switching frequency rated at 250 kHz
- VCC operating range from 10 to 20 V
- 500 mA gate-drive source current capability
- 800 mA gate-drive sink current capability
- 40 ns typical gate output rise time
- 20 ns typical gate output fall time
- Integrated overcurrent protection threshold at 250 uA typical
- Zero-current detection comparator threshold at 100 mV typical
- Thermal shutdown threshold of 155°C typical
Typical Applications
- Power factor correction stages
- Fixed-frequency DCM PFC converters
- Critical Conduction Mode PFC converters
- AC input power conversion
- High-voltage startup power supplies
- Synchronized oscillator PFC designs
- Standby-controlled power supplies
Procurement Notes
When requesting a quote for NCP1605, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.
FAQ
What operating modes does the NCP1605 support?
The NCP1605 supports fixed-frequency discontinuous conduction mode or Critical Conduction Mode operation for power factor correction. Its extracted switching specification lists a maximum switching frequency of 250 kHz.
What package is specified for the NCP1605?
The package case is listed as SOIC-16, D suffix, case 751B. The same package data includes 145°C/W junction-to-air thermal resistance and 550 mW maximum power dissipation at TA = 70°C.
What gate-drive capability is provided by the NCP1605?
The gate driver provides 500 mA source current capability at VPin10 = 0 V and 800 mA sink current capability at VPin10 = 10 V. Typical output transition times are 40 ns rise and 20 ns fall with CL = 1 nF.
What protection thresholds are specified for this controller?
Specified protection parameters include 250 uA typical overcurrent threshold, 2.500 V typical shutdown threshold at Pin 13, 2.500 V typical OVP/UVP threshold, undervoltage protection at 12% typical of VREF, and 155°C typical thermal shutdown.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 26, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.