Specifications
| Type | Description |
|---|---|
| Part Number | TPS61187 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Component Type | Power_IC |
| Package Case | RTJ WQFN-20, 4.00 mm x 4.00 mm nominal body |
| Input Voltage Range | 4.5 to 24 V; recommended operating conditions |
| Maximum Output Voltage | 38 V; recommended operating conditions, VOUT relative to VIN |
| Integrated MOSFET Rating | 2 A, 40 V; internal power MOSFET |
| Supported LED Count | Up to 60 WLEDs; total supported LEDs across six current sink regulators |
| Number of Current Sinks | 6; IFB1 to IFB6 regulated current sink input pins |
| Current Sink Maximum Output Current | 30 mA; IFB = 350 mV |
| Typical Current Matching | 1.5% typical; feature summary |
| Current Matching | 1.3%; KISET, (Imax - Imin) / IAVG, IISET = 20 uA |
| Current Accuracy | -2% to +2%; IISET = 20 uA, TA = 0°C to 70°C |
| Current Accuracy | -2.3% to +2.3%; IISET = 20 uA, TA = -40°C to 85°C |
| ISET Pin Voltage | 1.204 V min, 1.229 V typ, 1.253 V max; VIN = 12 V, PWM/EN = high, IFB current = 20 mA, IFB voltage = 500 mV |
| ISET Current Multiplier | 980; KISET |
| PWM Dimming Frequency | 20 kHz typ; RFPWM = 9.09 kohm |
| Direct PWM Dimming Frequency Range | 100 Hz to 50 kHz; direct PWM mode |
| Frequency Programmable PWM Dimming Range | 100 Hz to 22 kHz; frequency programmable mode |
| IFBx PWM Dimming Frequency | 0.1 to 22 kHz; frequency programmable mode, 5-us minimum pulse on time |
| IFBx PWM Dimming Frequency | 0.1 to 50 kHz; direct PWM mode |
| PWM Input Signal Frequency | 0.1 to 22 kHz; recommended operating conditions |
| Dimming Ratio | 100:1; at 20 kHz |
| Dimming Ratio | 10000:1; at 200 Hz, direct PWM mode |
| Programmable Switching Frequency | 300 kHz to 1 MHz; feature summary and recommended boost regulator switching frequency |
| Boost Regulator Switching Frequency | 300 to 1000 kHz; recommended operating conditions |
| Oscillator Frequency | 0.8 MHz min, 1 MHz typ, 1.2 MHz max; RFSW = 499 kohm |
| Maximum Duty Cycle | 94%; IFB = 0 |
| Inductor Value | 10 to 22 uH; 600-kHz to 1-MHz switching frequency |
| Inductor Value | 22 to 47 uH; 300-kHz to 600-kHz switching frequency |
| Input Capacitor | 1 uF; recommended operating conditions |
| Output Capacitor | 1 uF min, 4.7 uF typ, 10 uF max; recommended operating conditions |
| Operating Free-Air Temperature | -40°C to 85°C; recommended operating conditions |
| Operating Junction Temperature | -40°C to 125°C; recommended operating conditions |
| Absolute Maximum VIN and FAULT Voltage | -0.3 to 24 V; with respect to network ground terminal |
| Absolute Maximum FPO Voltage | -0.3 to 7 V; with respect to network ground terminal |
| Absolute Maximum SW Voltage | -0.3 to 40 V; with respect to network ground terminal |
| Absolute Maximum EN, PWM, IFB1 to IFB4 Voltage | -0.3 to 20 V; with respect to network ground terminal |
| Absolute Maximum VDDIO Voltage | -0.3 to 3.7 V; with respect to network ground terminal |
| Absolute Maximum All Other Pins Voltage | -0.3 to 3.6 V; with respect to network ground terminal |
| Absolute Maximum Operating Junction Temperature | -40°C to 150°C; absolute maximum ratings |
| Storage Temperature Range | -65°C to 150°C; absolute maximum ratings |
| HBM ESD Rating | ±4000 V; per ANSI/ESDA/JEDEC JS-001 |
| CDM ESD Rating | ±1500 V; per JEDEC JESD22-C101 |
| Machine Model ESD Rating | 200 V; ESD ratings |
| Operating Quiescent Current into VIN | 4 mA typ; device enabled, switching 1 MHz, no load, VIN = 24 V |
| VDDIO Output Voltage | 3.0 V min, 3.3 V typ, 3.6 V max; ILOAD = 5 mA |
| Shutdown Current | 11 uA typ; VIN = 12 V, EN = low |
| Shutdown Current | 16 uA typ; VIN = 24 V, EN = low |
| VIN Undervoltage Lockout Threshold | 3.5 V typ; VIN ramp down |
| VIN Undervoltage Lockout Threshold | 3.75 V typ; VIN ramp up |
| VIN Undervoltage Lockout Hysteresis | 250 mV typ; VIN UVLO hysteresis |
| EN Logic High Threshold | 2.1 V min; EN input |
| EN Logic Low Threshold | 0.8 V max; EN input |
| PWM Logic High Threshold | 2.1 V min; PWM input |
| PWM Logic Low Threshold | 0.8 V max; PWM input |
| PWM and EN Pulldown Resistance | 400 kohm min, 800 kohm typ, 1600 kohm max; pulldown resistor on PWM and EN |
| IFB Pin Leakage Current | 2 uA typ, 5 uA max; IFB voltage = 15 V, each pin |
| IFB Pin Leakage Current | 1 uA typ, 2 uA max; IFB voltage = 5 V, each pin |
| Output Voltage Up Threshold | 350 mV typ; measured on minimum IFB voltage, VIFB(min) |
| Output Voltage Down Threshold | 650 mV typ; measured on minimum IFB voltage, VIFB(min) |
| PWM FET On-Resistance | 0.25 ohm typ, 0.35 ohm max; VIN = 12 V |
| PWM FET Leakage Current | 2 uA max; VSW = 40 V, TA = 25°C |
| N-Channel MOSFET Current Limit | 2 A min, 3 A typ; D = Dmax |
| Output Voltage Clamp Program Threshold | 1.90 V min, 1.95 V typ, 2.00 V max; VCLAMP_TH |
| IFB Overvoltage Threshold | 12 V min, 13.5 V typ, 15 V max; measured on IFBx pin, IFB on |
| FPO Logic Low Voltage | 0.4 V max; ISOURCE = 0.5 mA |
| FAULT High Voltage | 0.1 V typ; measured as VIN - VFAULT |
| FAULT Low Voltage | 6 V min, 8 V typ, 10 V max; measured as VIN - VFAULT, sink current = 10 uA |
| FAULT Maximum Sink Current | 20 uA; VIN - VFAULT = 0 V |
| Thermal Shutdown Threshold | 150°C; thermal shutdown |
| Thermal Shutdown Hysteresis | 15°C; thermal shutdown |
| Junction-to-Ambient Thermal Resistance | 39.9°C/W; RTJ WQFN-20 package |
| Junction-to-Case Top Thermal Resistance | 34.0°C/W; RTJ WQFN-20 package |
| Junction-to-Board Thermal Resistance | 9.9°C/W; RTJ WQFN-20 package |
| Junction-to-Top Characterization Parameter | 0.6°C/W; RTJ WQFN-20 package |
| Junction-to-Board Characterization Parameter | 9.5°C/W; RTJ WQFN-20 package |
| Junction-to-Case Bottom Thermal Resistance | 2°C/W; RTJ WQFN-20 package |
| Datasheet Status | request_only |
Product Overview
The TPS61187 from Texas Instruments is a Power_Management white LED driver built around a boost regulator and six regulated current sink inputs, IFB1 through IFB6. It supports up to 60 WLEDs across the six current sink regulators and uses an internal 2 A, 40 V power MOSFET.
Recommended operating conditions specify a 4.5 to 24 V input range and a maximum output voltage of 38 V relative to VIN. Each current sink supports up to 30 mA at IFB = 350 mV, with current accuracy specified at -2% to +2% from 0°C to 70°C and -2.3% to +2.3% from -40°C to 85°C.
The device supports direct PWM dimming from 100 Hz to 50 kHz and frequency programmable PWM dimming from 100 Hz to 22 kHz. Boost switching frequency is programmable from 300 kHz to 1 MHz, with recommended inductor ranges of 10 to 22 uH for 600 kHz to 1 MHz and 22 to 47 uH for 300 kHz to 600 kHz. The package is RTJ WQFN-20, 4.00 mm x 4.00 mm nominal body.
Key Features
- 4.5 to 24 V recommended input operating range
- 38 V maximum output voltage relative to VIN
- Integrated 2 A, 40 V internal power MOSFET
- Supports up to 60 WLEDs across six sinks
- Six regulated IFB current sink input pins
- 30 mA maximum current sink output at IFB = 350 mV
- Direct PWM dimming range from 100 Hz to 50 kHz
- Programmable boost switching frequency from 300 kHz to 1 MHz
- 10000:1 dimming ratio at 200 Hz direct PWM
- RTJ WQFN-20, 4.00 mm x 4.00 mm package
Typical Applications
- White LED driver circuits
- Multi-string WLED arrays
- PWM-dimmed LED lighting
- Boost-regulated LED strings
- Six-channel LED current regulation
- WLED systems requiring 4.5 to 24 V input
Procurement Notes
When requesting a quote for TPS61187, 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 does TPS61187 support?
TPS61187 is specified for a recommended input voltage range of 4.5 to 24 V. Its absolute maximum VIN and FAULT voltage rating is -0.3 to 24 V with respect to network ground terminal.
How many LED current sinks are included in TPS61187?
TPS61187 includes six regulated current sink input pins, IFB1 through IFB6. The extracted datasheet facts state support for up to 60 WLEDs across the six current sink regulators.
What dimming frequency ranges are specified for TPS61187?
TPS61187 supports direct PWM dimming from 100 Hz to 50 kHz and frequency programmable PWM dimming from 100 Hz to 22 kHz. IFBx PWM dimming is specified as 0.1 to 50 kHz in direct PWM mode.
What package is used for the TPS61187 device?
TPS61187 is listed in an RTJ WQFN-20 package with a 4.00 mm x 4.00 mm nominal body. Thermal data for this package includes 39.9°C/W junction-to-ambient thermal resistance.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 7, 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.