Specifications
| Type | Description |
|---|---|
| Part Number | LP8553 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Package / Case | DSBGA25-bump package, 2.466 x 2.466 x 0.6 mm, package number YZR002511A |
| Input Voltage Range | 2.7-22 V; supports 1x to 5x cell Li-Ion batteries; low input voltage application requires external 5 V rail for VLDO and VIN when 2.7 V <= VBATT < 5.5 V |
| Operating Input Voltage Range | 5.5-22 V; VIN, typical application 1 |
| Operating Input Voltage Range With External LDO Rail | 4.5-5.5 V; VIN + VLDO, typical application 2 |
| Digital IO Reference Voltage | 1.65-5 V; VDDIO operating rating for I2C interface and PWM input |
| LED Output Channels | 4; OUT1 to OUT4 current sink outputs |
| Absolute Maximum VIN | -0.3 to +24.0 V; voltage with respect to GND pins |
| Absolute Maximum VLDO | -0.3 to +6.0 V; voltage with respect to GND pins |
| Absolute Maximum Logic Pin Voltage | -0.3 to +6.0 V; VSYNC, PWM, EN, SCLK, SDA |
| Absolute Maximum FAULT Pin Voltage | -0.3 V to VDDIO + 0.3 V; FAULT logic pin |
| Absolute Maximum Analog Pin Voltage | -0.3 to +6.0 V; FILTER, VDDIO, ISET, FSET |
| Absolute Maximum OUT/SW/FB Voltage | -0.3 to +44.0 V; OUT1 to OUT4, SW, FB pins |
| Operating OUT/SW/FB Voltage | 0-40 V; OUT1 to OUT4, SW, FB pins |
| Junction Temperature Range | -30 to +125 °C; operating rating |
| Ambient Temperature Range | -30 to +85 °C; operating rating |
| Thermal Shutdown Threshold | 150 °C typ; thermal shutdown engages at junction temperature |
| Thermal Shutdown Release | 130 °C typ; thermal shutdown disengages at junction temperature |
| Junction-to-Ambient Thermal Resistance | 40-73 °C/W; YZR package, application and board-layout dependent |
| Standby Supply Current | 1 µA typ; internal LDO disabled, EN = low, PWM = low |
| Normal Mode Supply Current | 3.0 mA typ; LDO enabled, boost enabled, no LED output current, 5 MHz PLL clock |
| Normal Mode Supply Current | 3.7 mA typ; LDO enabled, boost enabled, no LED output current, 10 MHz PLL clock |
| Normal Mode Supply Current | 4.7 mA typ; LDO enabled, boost enabled, no LED output current, 20 MHz PLL clock |
| Normal Mode Supply Current | 6.7 mA typ; LDO enabled, boost enabled, no LED output current, 40 MHz PLL clock |
| Internal Oscillator Frequency Accuracy | -4% to +4% typ, -7% to +7% max; electrical characteristics |
| Internal LDO Voltage | 4.5 V min, 5.0 V typ, 5.5 V max; VLDO |
| Internal LDO External Loading | 5.0 mA typ; ILDO |
| Boost Switch On Resistance | 0.12 ohm typ; ISW = 0.5 A |
| Boost Maximum Output Voltage | 40 V; VMAX |
| Maximum Continuous Load Current | 450 mA typ; 9.0 V <= VBATT, VOUT = 35 V |
| Maximum Continuous Load Current | 300 mA typ; 6.0 V <= VBATT, VOUT = 35 V |
| Maximum Continuous Load Current | 180 mA typ; 3.0 V <= VBATT, VOUT = 25 V |
| VOUT/VIN Conversion Ratio | 10; fSW = 1.25 MHz |
| Boost Switching Frequency | 156 kHz; BOOST_FREQ = 00 |
| Boost Switching Frequency | 312 kHz; BOOST_FREQ = 01 |
| Boost Switching Frequency | 625 kHz; BOOST_FREQ = 10 |
| Boost Switching Frequency | 1250 kHz; BOOST_FREQ = 11 |
| Over-Voltage Protection Voltage | VBOOST + 1.6 V; VOV |
| Switch Pulse Minimum Width | 50 ns typ; no load |
| Boost Startup Time | 6 ms typ; measured from boost activation until VOUT crosses 90% of target value |
| SW Pin Current Limit | 1.4 A typ; BOOST_IMAX = 0 |
| SW Pin Current Limit | 2.5 A typ; BOOST_IMAX = 1 |
| LED Output Leakage Current | 0.1 µA typ, 1 µA max; OUT1 to OUT4, VOUT = 40 V |
| Maximum LED Sink Current | 30 mA; OUT1 to OUT4, EN_I_RES = 0, CURRENT[7:0] = FFh |
| Maximum LED Sink Current | 50 mA; OUT1 to OUT4, EN_I_RES = 1, CURRENT[7:0] = FFh |
| Output Current Accuracy | -3% to +3% typ, -4% to +4% max; output current set to 23 mA, EN_I_RES = 1 |
| Output Current Matching | 0.5% typ; output current set to 23 mA, EN_I_RES = 1 |
| PWM Output Resolution | 8-13 bits; depends on LED frequency and PLL clock; 8 bits at fLED = 20 kHz, fPLL = 5 MHz; 13 bits at fLED = 5 kHz, fPLL = 40 MHz |
| LED Switching Frequency | 600 Hz; PWM_FREQ[4:0] = 00000b, PLL clock = 5 MHz |
| LED Switching Frequency | 19.2 kHz; PWM_FREQ[4:0] = 11111b, PLL clock = 5 MHz |
| LED Output Saturation Voltage | 105 mV typ, 220 mV max; output current set to 20 mA |
| LED Output Saturation Voltage | 160 mV typ, 290 mV max; output current set to 30 mA |
| PWM Input Frequency Range | 0.1-25 kHz; PWM interface |
| PWM Minimum Pulse ON Time | 1 µs; PWM interface |
| PWM Minimum Pulse OFF Time | 1 µs; PWM interface |
| Turn-On Delay From Standby to Backlight On | 6 ms typ; PWM input active, EN pin rises from low to high |
| Turn-Off Delay | 50 ms typ; PWM input low time for turnoff, slope disabled |
| PWM Input Resolution | 10 bits; fIN < 9.0 kHz |
| PWM Input Resolution | 11 bits; fIN < 4.5 kHz |
| PWM Input Resolution | 12 bits; fIN < 2.2 kHz |
| PWM Input Resolution | 13 bits; fIN < 1.1 kHz |
| UVLO Threshold Voltage | Disabled; UVLO[1:0] = 00 |
| UVLO Falling Threshold | 2.55 V min, 2.70 V typ, 2.94 V max; UVLO[1:0] = 01 |
| UVLO Rising Threshold | 2.62 V min, 2.76 V typ, 3.00 V max; UVLO[1:0] = 01 |
| UVLO Falling Threshold | 5.11 V min, 5.40 V typ, 5.68 V max; UVLO[1:0] = 10 |
| UVLO Rising Threshold | 5.38 V min, 5.70 V typ, 5.98 V max; UVLO[1:0] = 10 |
| UVLO Falling Threshold | 7.75 V min, 8.10 V typ, 8.45 V max; UVLO[1:0] = 11 |
| UVLO Rising Threshold | 8.36 V min, 8.73 V typ, 9.20 V max; UVLO[1:0] = 11 |
| EN Input Low Level | 0.4 V max; logic input EN |
| EN Input High Level | 1.2 V min; logic input EN |
| EN Input Current | -1.0 to +1.0 µA; logic input EN |
| VSYNC Input Low Level | 0.4 V max; logic input VSYNC |
| VSYNC Input High Level | 2.2 V min; logic input VSYNC |
| VSYNC Input Current | -1.0 to +1.0 µA; logic input VSYNC |
| VSYNC Frequency Range | 58-55000 Hz; logic input VSYNC |
| PWM Input Low Level | 0.2 x VDDIO V max; logic input PWM |
| PWM Input High Level | 0.8 x VDDIO V min; logic input PWM |
| PWM Input Current | -1.0 to +1.0 µA; logic input PWM |
| SCL/SDA Input Low Level | 0.2 x VDDIO V max; logic inputs SCL and SDA |
| SCL/SDA Input High Level | 0.8 x VDDIO V min; logic inputs SCL and SDA |
| SCL/SDA Input Current | -1.0 to +1.0 µA; logic inputs SCL and SDA |
| SDA/FAULT Output Low Level | 0.3 V typ, 0.5 V max; IOUT = 3 mA pull-up current |
| SDA/FAULT Output Leakage Current | -1.0 to +1.0 µA; VOUT = 2.8 V |
| I2C Clock Frequency | 400 kHz max; SDA, SCLK serial bus timing |
| I2C START Hold Time | 0.6 µs min; repeated START condition |
| I2C Clock Low Time | 1.3 µs min; SDA, SCLK serial bus timing |
| I2C Clock High Time | 600 ns min; SDA, SCLK serial bus timing |
| I2C Repeated START Setup Time | 600 ns min; SDA, SCLK serial bus timing |
| I2C Data Hold Time | 50 ns min; SDA, SCLK serial bus timing |
| I2C Data Setup Time | 100 ns min; SDA, SCLK serial bus timing |
| Datasheet Status | request_only |
Product Overview
The LP8553 is a Texas Instruments Power_Management Power IC for LED backlight driving. It integrates four current-sink outputs, OUT1 through OUT4, with a boost stage rated for a 40 V maximum output voltage and 0-40 V operating range on OUT, SW, and FB pins. The package is a DSBGA25-bump YZR002511A case measuring 2.466 x 2.466 x 0.6 mm.
Input operation covers 2.7-22 V for 1x to 5x Li-Ion battery systems, with the low-input-voltage application requiring an external 5 V rail for VLDO and VIN when VBATT is below 5.5 V. Typical application ratings include 5.5-22 V on VIN or 4.5-5.5 V on VIN plus VLDO.
Control interfaces include a 1.65-5 V VDDIO reference for I2C and PWM input. The device supports up to 400 kHz I2C clocking, PWM input from 0.1-25 kHz, LED PWM resolution from 8 to 13 bits, selectable UVLO thresholds, and thermal shutdown at 150 °C typical with 130 °C typical release.
Key Features
- 2.7-22 V input for 1x to 5x Li-Ion systems
- Four OUT1 to OUT4 LED current-sink outputs
- 30 mA or 50 mA maximum LED sink current
- 40 V boost maximum output voltage
- Selectable 156, 312, 625, or 1250 kHz boost frequency
- PWM input supports 0.1-25 kHz operation
- I2C serial interface supports 400 kHz clock frequency
- 8-13 bit PWM output resolution
- 1 µA typical standby supply current
- Thermal shutdown at 150 °C typical junction temperature
Typical Applications
- LED backlight driver circuits
- Li-Ion battery display backlights
- PWM-controlled backlight dimming
- I2C-configured LED backlight systems
- Four-channel LED current sink designs
- Boost-driven LED string supplies
- VSYNC-synchronized backlight control
Procurement Notes
When requesting a quote for LP8553, 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 the LP8553 support?
The LP8553 supports a 2.7-22 V input range for 1x to 5x Li-Ion battery systems. For low input voltage operation with 2.7 V <= VBATT < 5.5 V, the extracted datasheet facts specify an external 5 V rail for VLDO and VIN.
How many LED output channels are available on LP8553?
The device provides four LED current-sink outputs identified as OUT1 through OUT4. The maximum LED sink current is 30 mA when EN_I_RES = 0 and 50 mA when EN_I_RES = 1, with CURRENT[7:0] set to FFh.
What control interfaces are specified for the LP8553?
The LP8553 uses a VDDIO operating reference of 1.65-5 V for the I2C interface and PWM input. The I2C serial bus supports up to 400 kHz clock frequency, while the PWM input frequency range is 0.1-25 kHz.
What package is used for the Texas Instruments LP8553?
The LP8553 is listed in a DSBGA25-bump package with package number YZR002511A. The extracted package dimensions are 2.466 x 2.466 x 0.6 mm.
What thermal limits are specified for the LP8553?
The operating junction temperature range is -30 to +125 °C, and the ambient operating range is -30 to +85 °C. Thermal shutdown engages at 150 °C typical junction temperature and releases at 130 °C typical.
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.