Specifications
| Type | Description |
|---|---|
| Part Number | NCP1587 |
| Manufacturer | TDK |
| Product Type | LDO Regulator |
| Category | Power Management |
| Component Type | Power_IC |
| Package Case | SOIC-8, case 751 |
| Input Voltage Range | 4.5 to 13.2 V; operating supply range, VCC |
| Output Voltage Minimum | 0.8 V; capable output voltage |
| Oscillator Frequency | 275 kHz; NCP1587 internal oscillator |
| Oscillator Frequency | 200 kHz; NCP1587A internal oscillator |
| Boost Pin Voltage | 30 V; boost pin operation |
| Reference Voltage Accuracy | 0.8 V ±1.0%; internal reference voltage |
| Gate Driver Current | 1 A; internal gate drivers |
| Maximum Duty Cycle | 80%; feature specification |
| Package | SOIC-8; ordering information, NCP1587DR2G and NCP1587ADR2G |
| Shipping Format | 2500/Tape & Reel; NCP1587DR2G and NCP1587ADR2G |
| Main Supply Voltage Absolute Maximum | -0.3 to 15 V; VCC pin |
| Bootstrap Supply Voltage Absolute Maximum | -0.3 to 35 V wrt/PGND; BST pin |
| Bootstrap Supply Transient Voltage | 40 V for <50 ns wrt/PGND; BST pin transient rating |
| Bootstrap Supply Voltage to Switch Node | -0.3 to 15 V wrt/SW; BST pin |
| Switching Node Absolute Maximum | -5.0 to 35 V; PHASE pin |
| Switching Node Transient Rating | -10 V for <200 ns; 40 V for <50 ns; PHASE pin transient rating |
| High-Side Driver Output Voltage | -0.3 to 30 V wrt/GND; TG pin |
| High-Side Driver Output to PHASE | 15 V wrt/PHASE max; -2 V for <200 ns wrt/PHASE min; TG pin |
| Low-Side Driver Output Voltage | -0.3 to 15 V; BG pin |
| Low-Side Driver Negative Transient | -5.0 V for <200 ns; BG pin |
| Feedback Pin Voltage | -0.3 to 5.5 V; FB absolute maximum |
| COMP/DIS Pin Voltage | -0.3 to 5.5 V; COMP/DIS absolute maximum |
| Thermal Resistance Junction-to-Ambient | 165 °C/W; maximum ratings, RθJA |
| Thermal Resistance Junction-to-Case | 45 °C/W; maximum ratings, RθJC |
| Operating Junction Temperature Range | 0 to 125 °C; NCP1587A |
| Operating Ambient Temperature Range | 0 to 70 °C; NCP1587A |
| Storage Temperature Range | -55 to +150 °C; Tstg |
| Lead Temperature | 260 °C; Pb-free reflow soldering, 10 sec, SMD styles only |
| Input Voltage Range | min 4.5 V, max 13.2 V; electrical characteristics |
| Boost Voltage Range | min 4.5 V, max 26.5 V; electrical characteristics |
| Quiescent Supply Current | min 1.0 mA, max 8.0 mA; VFB = 1.0 V, no switching, VCC = 13.2 V |
| Boost Quiescent Current | min 0.1 mA, max 1.0 mA; VFB = 1.0 V, no switching, VCC = 13.2 V |
| UVLO Threshold | min 3.8 V, max 4.2 V; VCC rising edge |
| UVLO Hysteresis | typ 350 mV; electrical characteristics |
| Feedback Voltage | min 792 mV, typ 800 mV, max 808 mV; TA = 0 to 70°C, control loop in regulation |
| Oscillator Frequency | min 250 kHz, typ 275 kHz, max 300 kHz; NCP1587, TA = 0 to 70°C |
| Oscillator Frequency | min 180 kHz, typ 200 kHz, max 220 kHz; NCP1587A, TA = 0 to 70°C |
| Ramp-Amplitude Voltage | min 0.8 V, typ 1.1 V, max 1.4 V; electrical characteristics |
| Minimum Duty Cycle | min 0%; electrical characteristics |
| Maximum Duty Cycle | min 70%, typ 75%, max 80%; electrical characteristics |
| Error Amplifier Transconductance | min 3.0 mmho, max 4.4 mmho; GM error amplifier |
| Error Amplifier Open Loop DC Gain | min 55 dB, typ 70 dB; GM error amplifier |
| Error Amplifier Output Source Current | min 80 µA, typ 120 µA; VFB < 0.8 V |
| Error Amplifier Output Sink Current | min 80 µA, typ 120 µA; VFB > 0.8 V |
| Error Amplifier Input Bias Current | typ 0.1 µA, max 1.0 µA; electrical characteristics |
| Soft-Start Source Current | min 8.49 µA, typ 11 µA, max 13.3 µA; VFB < 0.8 V |
| Soft-Start Switch Over Threshold | typ 100% of Vref; VFB = 0.8 V |
| Upper Gate Source Current | typ 1.0 A; VCC = 12 V, VTG = VBG = 2.0 V |
| Upper Gate Sink Current | typ 1.0 A; VCC = 12 V, VTG = VBG = 2.0 V |
| Lower Gate Source Current | typ 1.0 A; VCC = 12 V, VTG = VBG = 2.0 V |
| Lower Gate Sink Current | typ 2.0 A; VCC = 12 V, VTG = VBG = 2.0 V |
| TG Falling to BG Rising Delay | typ 40 ns, max 90 ns; VCC = 12 V, TG < 2.0 V, BG > 2.0 V |
| BG Falling to TG Rising Delay | typ 35 ns, max 90 ns; VCC = 12 V, BG < 2.0 V, TG > 2.0 V |
| Enable Threshold | min 0.3 V, typ 0.4 V, max 0.5 V; COMP/DIS pin threshold |
| OCSET Current Source | min 9.89 µA, typ 10 µA, max 11.1 µA; sourced from BG pin before soft-start |
| OC Switch-Over Threshold | typ 700 mV; over-current protection |
| Fixed OC Threshold | typ -375 mV; over-current protection |
| Overcurrent Threshold Programming Range | 50 to 550 mV; set by resistor between BG and GND |
| OCP Programming Current | 10 µA; internal current sourced from BG pin after VCC rises above UVLO |
| OCP Setting Time | about 6 ms; over-current setting procedure duration |
| RSET Value Range | 5 kΩ to 55 kΩ; overcurrent threshold programming resistor |
| Current Trip Threshold Tolerance | ±25 mV; overcurrent protection set point |
| Datasheet Status | request_only |
Product Overview
The controller uses an internal oscillator, with NCP1587 specified at 275 kHz typical and NCP1587A specified at 200 kHz typical. Duty-cycle behavior includes a 0% minimum duty cycle and a maximum duty-cycle electrical-characteristics range of 70% minimum, 75% typical, and 80% maximum. Gate-drive specifications include 1.0 A typical upper-gate source and sink current, 1.0 A lower-gate source current, and 2.0 A lower-gate sink current.
Key Features
- 4.5 to 13.2 V VCC operating range
- Output voltage capability down to 0.8 V
- 275 kHz typical oscillator for NCP1587
- 200 kHz typical oscillator for NCP1587A
- 0.8 V internal reference with ±1.0% accuracy
- Internal gate drivers rated at 1 A
- Maximum duty cycle specified up to 80%
- Boost pin operation specified at 30 V
- Programmable overcurrent threshold from 50 to 550 mV
- SOIC-8 package with 2500/Tape & Reel shipping
- UVLO rising threshold specified from 3.8 to 4.2 V
- Operating ambient range specified from 0 to 70°C
Typical Applications
- Synchronous buck converter control
- Low-voltage rail generation
- Power_Management controller designs
- External MOSFET gate drive
- Overcurrent-programmed buck supplies
- 4.5 to 13.2 V input rails
- 0.8 V regulated outputs
Procurement Notes
When requesting a quote for NCP1587, 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 input voltage range is specified for NCP1587?
The NCP1587 VCC operating supply range is specified as 4.5 to 13.2 V. The electrical characteristics also list the input voltage range with a minimum of 4.5 V and maximum of 13.2 V.
What oscillator frequencies are listed for NCP1587 variants?
The NCP1587 internal oscillator is specified at 275 kHz, with electrical-characteristics limits of 250 kHz minimum, 275 kHz typical, and 300 kHz maximum. The NCP1587A oscillator is specified at 200 kHz typical.
What package and shipping format are specified?
The package case is listed as SOIC-8, case 751. Ordering information for NCP1587DR2G and NCP1587ADR2G specifies an SOIC-8 package and a 2500/Tape & Reel shipping format.
How is overcurrent threshold programming specified?
The extracted datasheet facts list an overcurrent threshold programming range of 50 to 550 mV, set by a resistor between BG and GND. The RSET value range is 5 kΩ to 55 kΩ, with a current trip threshold tolerance of ±25 mV.
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.