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TPS5103IDBR
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Texas Instruments DC-DC Converters, SSOP-20-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownTPS5103IDBR
Texas Instruments · DC-DC Converters · SSOP-20-208mil
TPS5103IDBR from Texas Instruments, in a SSOP-20-208mil. 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 | SOFTSTART | input | External capacitor from SOFTSTART to GND sets the soft-start timing for the controller. |
| 2 | INV | input | Inverting input of both the error amplifier and the hysteretic comparator. |
| 3 | FB | output | Feedback output of the error amplifier, brought out for loop-gain compensation. |
| 4 | CT | bidirectional | External capacitor from CT to GND adjusts the triangle oscillator and decreases the current-limiting voltage; the capacitor may be left open or added to adjust the overcurrent reset frequency. |
| 5 | RT | bidirectional | External resistor connection for adjusting the triangle oscillator frequency; connecting RT to VREF5 selects hysteretic mode. |
| 6 | GND | power_in | Control ground for the controller circuitry. |
| 7 | REF | output | 1.185 V reference voltage output used for output-voltage setting and voltage protection (COMP). |
| 8 | COMP | input | Comparator input for voltage monitoring, also used for input undervoltage protection; its inverting terminal is internally tied to REF (1.185 V). |
| 9 | PWM/SKIP | input | Mode select: low selects PWM mode and high selects SKIP mode. |
| 10 | STBY | input | Standby control input. |
| 11 | VREG5V_IN | input | External 5-V input; input voltage range is 4.5 V to 25 V. |
| 12 | VREF5 | output | Output of the internal 5-V linear regulator used for the high-side driver bootstrap voltage, with a stated tolerance of 6%. |
| 13 | VCC | power_in | Supply-voltage input for the controller. |
| 14 | VCC_SENSE | input | Supply-voltage sense for current protection, sensing the high-side MOSFET drain-to-source drop together with LL. |
| 15 | TRIP | input | External resistor connection that sets the output-current limit (overcurrent threshold) with an internal current source of 15 µA in PWM mode and 5 µA in SKIP mode. |
| 16 | OUTGND | power_in | Ground for the FET drivers, return for OUT_u and OUT_d gate-drive outputs. |
| 17 | OUT_d | bidirectional | Gate-drive output for the low-side power switching FET. |
| 18 | LL | bidirectional | Bootstrap low: high-side gate-driving return and output-current protection; connect to the junction of the high-side and low-side FETs for floating drive. |
| 19 | OUT_u | output | Gate-drive output for the high-side power switching FET; the maximum voltage between OUT_u and LL is limited to 5 V. |
| 20 | LH | bidirectional | Bootstrap pin: connect a 1 µF, low-ESR capacitor from LH to LL; the maximum voltage between LH and OUTGND is 30 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SSOP-20-208mil |
| Category | Power Management (PMIC) |
| Pins | 20 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage | VCC | 4.5 | 25 | V | 6 | ||
| Input voltage (INV, CT, RT, COMP, PWM/SKIP, SOFTSTART) | VI | 6 | V | 6 | |||
| Input voltage VREG5V_IN | VI | 5.5 | V | 6 | |||
| Input voltage STBY | VI | 12 | V | 6 | |||
| Input voltage TRIP, VCC_SENSE | VI | 25 | V | 6 | |||
| Operating temperature range | TA | -40 | 85 | °C | 6 | ||
| Supply voltage VCC | VCC | -0.3 | 27 | V | see Note 1 | 6 | |
| Input voltage INV, CT, RT, PWM/SKIP, SOFTSTART, COMP | VI | -0.3 | 7 | V | 6 | ||
| Input voltage VREG5V_IN | VI | -0.3 | 6 | V | 6 | ||
| Input voltage STBY | VI | -0.3 | 15 | V | 6 | ||
| Input voltage TRIP, VCC_SENSE | VI | -0.3 | 27 | V | 6 | ||
| Output current | IO | 3 | A | 6 | |||
| Low-level output voltage | VOL | -0.3 | 27 | V | 6 | ||
| High-level output voltage | VOH | -0.3 | 32 | V | 6 | ||
| Reference voltage | Vref | -0.3 | 3 | V | 6 | ||
| Operating free-air temperature range | TA | -40 | 85 | °C | 6 | ||
| Storage temperature range | Tstg | -55 | 150 | °C | 6 | ||
| Power rating, DB package | 801 | mW | TA ≤ 25°C | 6 | |||
| Power rating, DB package | 416 | mW | TA = 85°C | 6 | |||
| Reference voltage | Vref | 1.167 | 1.185 | 1.203 | V | TA = 25°C, Ivref = 50 µA | 7 |
| Reference voltage over temperature | Vref | 1.155 | 1.215 | V | Ivref = 50 µA | 7 | |
| High-level output voltage (DC) | VOH | 1 | 1.1 | 1.2 | V | DC; includes internal comparator error | 7 |
| Low-level output voltage (DC) | VOL | 0.4 | 0.5 | 0.6 | V | DC; includes internal comparator error | 7 |
| Hysteresis window | Vhys | 6 | 9.7 | 13 | mV | Hysteretic mode | 7 |
| 5-V regulator output voltage | VO | 4.7 | 5.3 | V | I = 10 mA | 8 | |
| 5-V switch threshold voltage (high) | VIT(high) | 4.2 | 4.9 | V | 8 | ||
| 5-V switch threshold voltage (low) | VIT(low) | 4.1 | 4.8 | V | 8 | ||
| 5-V switch hysteresis | Vhys | 50 | 150 | 250 | mV | 8 | |
| UVLO threshold voltage (high) | VIT(high) | 3.6 | 4.2 | V | 8 | ||
| UVLO threshold voltage (low) | VIT(low) | 3.5 | 4.1 | V | 8 | ||
| TRIP terminal current, PWM mode | ITRIP | 10 | 15 | 20 | µA | PWM mode, V(TRIP) = 7 V | 8 |
| TRIP terminal current, SKIP mode | ITRIP | 3 | 5 | 7 | µA | SKIP mode, V(TRIP) = 7 V | 8 |
| Softstart current | I(CTRL) | 1.9 | 2.5 | 3 | µA | 9 | |
| Output voltage monitor threshold voltage | VIT | 1.08 | 1.18 | 1.28 | V | 9 |
CAD (KiCad official)
- Symbol:
TPS5103IDBR - Footprint:
Package_SO:SSOP-20_5.3x7.2mm_P0.65mm - 3D model: SSOP-20-208mil (KiCad packages3D, STEP)
- 3D model files:
tps5103idbr-etched.step/tps5103idbr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tps5103idbr.step/tps5103idbr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (41 pp, sha256
dc4faf0f8eb87b52, retrieved 2026-10-07, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).