component

RT8511BGQW

Public Made by Adom

by adom

Richtek Tech LED Drivers, DFN-8-EP(2x2). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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RT8511BGQW

Richtek Tech · LED Drivers · DFN-8-EP(2x2)

RT8511BGQW from Richtek Tech, in a DFN-8-EP(2x2). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 OVP input Over-voltage protection sense input for the boost converter with a detecting threshold of 1.2V (1.14V to 1.26V).
2 FB input Feedback pin regulated to 200mV typ.; connect a resistor between this pin and GND to set the LED current.
3 DIMC passive PWM filter pin that filters the PWM signal to a DC voltage using an external capacitor (1µF typical).
4 GND power_in Ground.
5 LX passive Switch node of the boost converter, internal N-MOSFET rated -0.3V to 48V with 2.2A typ. current limit.
6 VIN power_in Power supply input, operating range 2.7V to 24V (absolute maximum 26.5V).
7 PWM input Dimming control input accepting a 100Hz to 8kHz PWM signal, logic high 1.6V min and logic low 0.8V max.
8 EN input Active-high chip enable for the boost converter, logic high 1.6V min and logic low 0.8V max.
9 GND power_in Exposed pad, must be soldered to a large PCB and connected to AGND for maximum power dissipation.

Key specifications

Parameter Value
Manufacturer Richtek Tech
Package DFN-8-EP(2x2)
Category Display Modules / LED Drivers / Display Drivers
Pins 9

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
VIN Shutdown Current ISHDN 1 4 µA VIN = 4.5V, VEN = 0V 4
EN, PWM Logic-High Threshold Voltage VIH 1.6 V VIN = 2.7V to 24V 4
EN, PWM Logic-Low Threshold Voltage VIL 0.8 V VIN = 2.7V to 24V 4
EN Sink Current IIH 1 10 µA VEN = 3V 4
Shutdown Delay tSHDN 52 64 80 ms EN high to low 4
PWM Dimming Frequency 0.1 8 kHz 4
Switching Frequency fOSC 0.4 0.5 0.6 MHz VIN = 2.7V to 24V 4
LX On Resistance (N-MOSFET) RDS(ON) 0.4 0.6 Ω VIN > 5V 4
Minimum Duty Cycle for PWM Dimming DMIN 1 % Dimming Freq. = 100Hz to 8kHz 5
Feedback Voltage VFB 195 200 205 mV 5
LX Current Limit ILIM 1.66 2.2 2.74 A 5
Over Voltage Protection Threshold VOVP 1.14 1.2 1.26 V 5
VIN Quiescent Current (switching) IQ_SW 2.2 mA VFB = 0V, Switching 4
VIN Quiescent Current IQ 725 µA VFB = 1.5V, No Switching 4
Minimum ON Time 60 ns 4
Maximum Duty Cycle DMAX 92 % VFB = 0V, Switching 4
Thermal Shutdown Temperature TSD 160 °C 5
Thermal Shutdown Hysteresis TSD 30 °C 5
Supply Input Voltage VIN 2.7 24 V 4
Junction Temperature Range TJ -40 125 °C 4
Ambient Temperature Range TA -40 85 °C 4
VIN, EN, PWM, DIMC to GND -0.3 26.5 V 4
FB, OVP to GND -0.3 48 V 4
LX to GND -0.3 48 V 4
LX to GND (< 500ns) -1 48 V < 500ns 4
Power Dissipation PD 0.833 W TA = 25°C, WDFN-8L 2x2 4
Lead Temperature 260 °C Soldering, 10 sec. 4
Junction Temperature TJ 150 °C 4
Storage Temperature Range -65 150 °C 4
ESD HBM 2 kV Human Body Model 4
ESD MM 200 V Machine Model 4
Thermal Resistance Junction to Ambient θJA 120 °C/W WDFN-8L 2x2, JEDEC 51-7 four-layer board, TA = 25°C 4
Thermal Resistance Junction to Case θJC 8.2 °C/W WDFN-8L 2x2, measured at exposed pad 4

CAD (KiCad official)

  • Symbol: RT8511BGQW
  • Footprint: Package_DFN_QFN:DFN-8-1EP_2x2mm_P0.5mm_EP0.6x1.2mm
  • 3D model: DFN-8-EP(2x2) (KiCad packages3D, STEP)
  • 3D model files: rt8511bgqw-etched.step / rt8511bgqw-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); rt8511bgqw.step / rt8511bgqw.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Richtek Tech datasheet (11 pp, sha256 029c4557cdff90a7, retrieved 2026-10-22, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF