Specifications
| Type | Description |
|---|---|
| Part Number | TPS61169 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | DCK 5-pin SC70 / SOT-5, 2.00 mm x 1.25 mm nominal body |
| Input Voltage Range | 2.7 to 5.5 V; recommended operating conditions |
| Integrated Switch FET Voltage Rating | 40 V; internal MOSFET rating |
| Integrated Switch FET Current Rating | 1.8 A; internal MOSFET rating |
| Minimum Switch Current Limit | 1.2 A; feature list |
| LED String Drive Voltage | Up to 38 V; LED string output capability |
| Output Voltage | VIN to 38 V; recommended operating conditions |
| Switching Frequency | 0.75 min, 1.2 typ, 1.5 max MHz; VIN = 3 V |
| Feedback Reference Voltage | 188 min, 204 typ, 220 max mV; Duty = 100%, TA >= 25°C |
| FB Pin Bias Current | 2.5 µA; VFB = 204 mV |
| Reference Filter Time Constant | 1 ms; VREF filter |
| N-Channel MOSFET On-Resistance | 0.35 typ, 0.7 max ohm; power switch |
| N-Channel MOSFET Leakage Current | 1 µA; VSW = 35 V |
| Switching MOSFET Current Limit | 1.2 min, 1.8 typ, 2.4 max A; D = DMAX, TA <= 85°C |
| Startup Current Limit | 0.72 A; TA <= 85°C, during soft start |
| Half Current Limit Time Step | 6.5 ms; soft-start protection timing |
| Output Overvoltage Threshold | 36 min, 37.5 typ, 39 max V; VOVP_SW |
| Undervoltage Lockout Threshold | 2.0 typ, 2.3 max V falling; 2.6 typ V rising |
| UVLO Hysteresis | 200 mV; VIN undervoltage lockout hysteresis |
| Operating Quiescent Current | 0.3 typ, 0.45 max mA; device enabled, switching at 1.2 MHz, no load |
| Shutdown Current | 1 typ, 2 max µA; CTRL = GND |
| CTRL Logic High Voltage | 1.2 V; control logic input threshold |
| CTRL Logic Low Voltage | 0.4 V; control logic input threshold |
| CTRL Internal Pull-Down Resistor | 300 kOhm; CTRL pin |
| CTRL Logic Low Time to Shutdown | 2.5 ms; CTRL high to low |
| PWM Dimming Frequency | 5 to 100 kHz; recommended operating conditions |
| PWM Dimming Duty Cycle | 1% to 100%; recommended operating conditions |
| Recommended Inductor | 4.7 to 10 µH; recommended operating conditions |
| Recommended Input Capacitor | 1 µF; recommended operating conditions |
| Recommended Output Capacitor | 1 to 10 µF; recommended operating conditions |
| Operating Junction Temperature | -40 to 125°C recommended; -40 to 150°C absolute maximum |
| Storage Temperature | -65 to 150°C; absolute maximum rating |
| VIN, CTRL, PWM, FB Absolute Maximum Voltage | -0.3 to 7 V; with respect to ground |
| SW Absolute Maximum Voltage | -0.3 to 40 V; with respect to ground |
| HBM ESD Rating | ±2000 V; ANSI/ESDA/JEDEC JS-001 |
| CDM ESD Rating | ±500 V; JEDEC JESD22-C101 |
| Junction-to-Ambient Thermal Resistance | 263.8°C/W; DCK SC70 5-pin package |
| Junction-to-Case Top Thermal Resistance | 76.1°C/W; DCK SC70 5-pin package |
| Junction-to-Board Thermal Resistance | 51.4°C/W; DCK SC70 5-pin package |
| Junction-to-Top Characterization Parameter | 1.1°C/W; DCK SC70 5-pin package |
| Junction-to-Board Characterization Parameter | 50.7°C/W; DCK SC70 5-pin package |
| Thermal Shutdown Threshold | 160°C; thermal shutdown |
| Thermal Shutdown Hysteresis | 15°C; thermal shutdown |
| Open LED Protection Condition | Shuts down when SW exceeds VOVP threshold and FB is less than 30 mV for 3 switching cycles |
| Pin 1 Function | SW, drain connection of internal power FET |
| Pin 2 Function | GND, ground |
| Pin 3 Function | FB, feedback pin for current; connect sense resistor from FB to GND |
| Pin 4 Function | CTRL, PWM dimming signal input |
| Pin 5 Function | VIN, supply input pin |
| Datasheet Status | request_only |
Product Overview
The TPS61169 is a Texas Instruments high-current boost WLED driver for Power_Management designs that require boosted LED string voltage from a low-voltage input. Recommended operation covers a 2.7 to 5.5 V input range and output operation from VIN to 38 V, with LED string drive capability up to 38 V.
The device integrates a 40 V, 1.8 A internal MOSFET with 0.35 ohm typical on-resistance and a switching MOSFET current limit specified at 1.2 A minimum, 1.8 A typical, and 2.4 A maximum. Switching frequency is specified at 0.75 MHz minimum, 1.2 MHz typical, and 1.5 MHz maximum at VIN = 3 V.
The DCK 5-pin SC70 / SOT-5 package assigns SW, GND, FB, CTRL, and VIN pins. The FB pin is used for LED current feedback through a sense resistor to ground, while CTRL accepts the PWM dimming input. Recommended external components include a 4.7 to 10 uH inductor, 1 uF input capacitor, and 1 to 10 uF output capacitor.
Key Features
- 2.7 to 5.5 V recommended input range
- LED string drive voltage up to 38 V
- VIN to 38 V recommended output range
- 40 V, 1.8 A integrated switch FET
- 1.2 MHz typical switching frequency at VIN = 3 V
- 188 to 220 mV feedback reference range
- 5 to 100 kHz PWM dimming frequency
- 1% to 100% PWM dimming duty cycle
- 36 to 39 V output overvoltage threshold
- 1 µA typical shutdown current at CTRL grounded
Typical Applications
- WLED string boost driving
- PWM-dimmed LED current control
- Low-voltage input LED drivers
- VIN-to-38 V boost outputs
- SC70 power-management assemblies
- Sense-resistor LED current feedback
Procurement Notes
When requesting a quote for TPS61169, 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 TPS61169 support?
TPS61169 is specified for a recommended input voltage range of 2.7 to 5.5 V. Its output operating range is specified from VIN to 38 V, and the LED string drive voltage capability is up to 38 V.
How is LED current feedback implemented on TPS61169?
The FB pin is the current feedback pin. The extracted pin description specifies connecting a sense resistor from FB to GND. The feedback reference voltage is 188 mV minimum, 204 mV typical, and 220 mV maximum at 100% duty and TA >= 25°C.
What dimming range is specified for TPS61169?
TPS61169 supports PWM dimming under recommended operating conditions. The PWM dimming frequency range is 5 to 100 kHz, and the PWM dimming duty-cycle range is 1% to 100%.
What protection behavior is specified for an open LED condition?
For open LED protection, the device shuts down when SW exceeds the VOVP threshold and FB is less than 30 mV for 3 switching cycles. The output overvoltage threshold is specified as 36 V minimum, 37.5 V typical, and 39 V maximum.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 8, 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.