Specifications
| Type | Description |
|---|---|
| Part Number | LP8550 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | DSBGA (YZR), 25 pins, 2.49 x 2.49 mm max body size |
| Component Type | Power_IC |
| Input Voltage Range | 2.7-22 V; supports 1x to 5x cell Li-Ion batteries |
| Recommended VIN Range | 5.5-22 V; Figure 27 operating condition |
| Recommended VIN + VLDO Range | 4.5-5.5 V; Figure 31 low-voltage operating condition |
| Digital I/O Reference Voltage | 1.65-5 V; VDDIO recommended operating condition |
| OUT/SW/FB Recommended Voltage Range | 0-40 V; V(OUT1...OUT6, SW, FB) |
| Junction Temperature Range | -30 to 125 °C; recommended operating condition |
| Ambient Temperature Range | -30 to 85 °C; recommended operating condition |
| Absolute Maximum VIN | -0.3 to 24 V; over operating free-air temperature range |
| Absolute Maximum VLDO | -0.3 to 6 V; over operating free-air temperature range |
| Logic Pin Voltage | -0.3 to 6 V; VSYNC, PWM, EN, SCLK, SDA absolute maximum rating |
| FAULT Pin Voltage | -0.3 to VDDIO + 0.3 V; logic pin FAULT absolute maximum rating |
| Analog Pin Voltage | -0.3 to 6 V; FILTER, VDDIO, ISET, FSET absolute maximum rating |
| OUT/SW/FB Absolute Maximum Voltage | -0.3 to 44 V; V(OUT1...OUT6, SW, FB) |
| Maximum Junction Temperature | 125 °C; absolute maximum rating, TJ-MAX |
| Storage Temperature Range | -65 to 150 °C; handling rating |
| ESD Rating HBM | -2 to 2 kV; Human body model per ANSI/ESDA/JEDEC JS-001, all pins |
| ESD Rating CDM | -200 to 200 V; Charged device model per JEDEC JESD22-C101, all pins |
| ESD Rating Machine Model | -1 to 1 kV; Machine model |
| Junction-to-Ambient Thermal Resistance | 40-73 °C/W; DSBGA, 25 pins; application and board-layout dependent |
| Standby Supply Current | 1 µA max; internal LDO disabled, EN = low and PWM = low |
| Normal Mode Supply Current at 5-MHz PLL | 3 mA typ; LDO enabled, boost enabled, no LED output current |
| Normal Mode Supply Current at 10-MHz PLL | 3.7 mA typ; LDO enabled, boost enabled, no LED output current |
| Normal Mode Supply Current at 20-MHz PLL | 4.7 mA typ; LDO enabled, boost enabled, no LED output current |
| Normal Mode Supply Current at 40-MHz PLL | 6.7 mA typ; LDO enabled, boost enabled, no LED output current |
| Internal Oscillator Frequency Accuracy at 25°C | -4% to 4%; TA = 25°C unless otherwise specified |
| Internal Oscillator Frequency Accuracy Over Temperature | -7% to 7%; -30°C <= TA <= 85°C |
| Internal LDO Voltage | 4.5 V min, 5 V typ, 5.5 V max; full operating ambient temperature range |
| Internal LDO External Loading | 5 mA max; TA = 25°C unless otherwise specified |
| Boost Switch ON Resistance | 0.12 ohm typ; ISW = 0.5 A |
| Boost Maximum Output Voltage | 40 V; boost converter electrical characteristic |
| Maximum Continuous Load Current at 9 V Battery | 450 mA; 9 V <= VBATT, VOUT = 35 V |
| Maximum Continuous Load Current at 6 V Battery | 300 mA; 6 V <= VBATT, VOUT = 35 V |
| Maximum Continuous Load Current at 3 V Battery | 180 mA; 3 V <= VBATT, VOUT = 25 V |
| Boost Conversion Ratio | 10; VOUT/VIN, fSW = 1.25 MHz |
| Switching Frequency, BOOST_FREQ = 00 | 156 kHz |
| Switching Frequency, BOOST_FREQ = 01 | 312 kHz |
| Switching Frequency, BOOST_FREQ = 10 | 625 kHz |
| Switching Frequency, BOOST_FREQ = 11 | 1250 kHz |
| Overvoltage Protection Voltage | VBOOST + 1.6 V; boost converter electrical characteristic |
| Switch Pulse Minimum Width | 50 ns; no load |
| Start-Up Time | 6 ms; from boost activation until VOUT crosses 90% of target value |
| SW Pin Current Limit, BOOST_IMAX = 0 | 1.4 A |
| SW Pin Current Limit, BOOST_IMAX = 1 | 2.5 A |
| LED Output Leakage Current | 0.1 µA typ, 1 µA max; OUT1 to OUT6, VOUT = 40 V |
| Maximum LED Sink Current, EN_I_RES = 0 | 30 mA; OUT1 to OUT6, CURRENT[7:0] = FFh |
| Maximum LED Sink Current, EN_I_RES = 1 | 50 mA; OUT1 to OUT6, CURRENT[7:0] = FFh |
| LED Outputs | 6 adjustable current sinks; OUT1 to OUT6 with LED short/open fault detection |
| LED Current Resolution | 8-bit; LED outputs |
| PWM Resolution | 8 to 13 true bits; steady state brightness control |
| PWM Dithering Resolution | Additional 1 to 3 bits; during brightness changes |
| Brightness Control Interfaces | PWM input or I2C-compatible serial interface; LED current sink control |
| EEPROM Default A0h | 10100001; device default value |
| EEPROM Default A1h | 01100000; device default value |
| EEPROM Default A2h | 10011111; device default value |
| EEPROM Default A3h | 00111111; device default value |
| EEPROM Default A4h | 00001000; device default value |
| EEPROM Default A5h | 10001010; device default value |
| EEPROM Default A6h | 01100100; device default value |
| EEPROM Default A7h | 00101001; device default value |
| Datasheet Status | request_only |
Product Overview
The LP8550 is a Texas Instruments LED backlight boost driver for Power_Management designs using Li-Ion battery inputs. The device supports a 2.7-22 V input range for 1x to 5x cell Li-Ion systems, with recommended VIN operation from 5.5-22 V and a 4.5-5.5 V VIN plus VLDO low-voltage operating condition.
Its boost converter supports up to 40 V output, with OUT, SW, and FB recommended for 0-40 V operation and absolute maximum ratings to 44 V. The converter provides selectable switching frequencies of 156 kHz, 312 kHz, 625 kHz, and 1250 kHz, a 0.12 ohm typical switch ON resistance, 50 ns minimum switch pulse width, and 6 ms startup to 90% of target output.
LED control is built around six adjustable current sinks with LED short/open fault detection. The outputs support 30 mA or 50 mA maximum sink-current ranges depending on EN_I_RES, 8-bit current resolution, 8 to 13 true bits of steady-state PWM resolution, and additional 1 to 3 bits of dithering during brightness changes.
Key Features
- 2.7-22 V input supports 1x to 5x Li-Ion cells
- Six adjustable LED current sinks with fault detection
- 8-bit LED current resolution for output current control
- PWM brightness resolution from 8 to 13 true bits
- Additional 1 to 3 PWM dithering bits during changes
- PWM input or I2C-compatible serial brightness interface
- Selectable 156 kHz to 1250 kHz boost switching
- 40 V boost maximum output voltage
- 1.4 A or 2.5 A SW current limit settings
- 25-pin DSBGA package with 2.49 x 2.49 mm body
Typical Applications
- LED backlight power management
- Li-Ion battery display backlights
- Six-channel LED current sink designs
- PWM-controlled brightness systems
- I2C-compatible backlight control
- Compact DSBGA power IC assemblies
Procurement Notes
When requesting a quote for LP8550, 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 type of device is the LP8550?
The LP8550 is a Texas Instruments Power_Management IC described as an LED backlight boost driver. It integrates a boost converter and six adjustable LED current sinks for backlight current control.
What input voltage range does LP8550 support?
The extracted datasheet facts specify a 2.7-22 V input voltage range, with support for 1x to 5x cell Li-Ion batteries. A recommended VIN range of 5.5-22 V is also listed.
How many LED outputs are available on LP8550?
LP8550 provides six adjustable current sinks, identified as OUT1 to OUT6. The LED outputs include short/open fault detection and support 8-bit LED current resolution.
What package is used for the LP8550?
The package is DSBGA (YZR) with 25 pins. The extracted package information lists a maximum body size of 2.49 x 2.49 mm.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 25, 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.