# TL594IPWR

**Texas Instruments** · DC-DC Controllers · TSSOP-16

TL594IPWR from Texas Instruments, in a TSSOP-16. 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 | 1IN+ | input | Noninverting input to error amplifier 1; amplifier input voltage range is -0.3 V to VCC - 2 V. |
| 2 | 1IN- | input | Inverting input to error amplifier 1; amplifier input voltage range is -0.3 V to VCC - 2 V. |
| 3 | FEEDBACK | input | Input pin for feedback; current into the FEEDBACK terminal is limited to 0.3 mA maximum. |
| 4 | DTC | input | Dead-time control comparator input. |
| 5 | CT | passive | Capacitor terminal used to set oscillator frequency; recommended timing capacitor is 0.47 nF to 10000 nF. |
| 6 | RT | passive | Resistor terminal used to set oscillator frequency; recommended timing resistor is 1.8 kΩ to 500 kΩ. |
| 7 | GND | power_in | Ground. |
| 8 | C1 | output | Collector terminal of BJT output 1; up to 200 mA per transistor recommended and 41 V absolute maximum collector voltage. |
| 9 | E1 | output | Emitter terminal of BJT output 1; uncommitted output transistor sinks or sources up to 200 mA. |
| 10 | E2 | output | Emitter terminal of BJT output 2; uncommitted output transistor sinks or sources up to 200 mA. |
| 11 | C2 | output | Collector terminal of BJT output 2; up to 200 mA per transistor recommended and 41 V absolute maximum collector voltage. |
| 12 | VCC | power_in | Positive supply; recommended operating range is 7 V to 40 V (41 V absolute maximum). |
| 13 | OUTPUT CTRL | input | Selects single-ended, parallel output, or push-pull operation. |
| 14 | REF | power_out | 5-V reference regulator output, trimmed to 1%. |
| 15 | 2IN- | input | Inverting input to error amplifier 2; amplifier input voltage range is -0.3 V to VCC - 2 V. |
| 16 | 2IN+ | input | Noninverting input to error amplifier 2; amplifier input voltage range is -0.3 V to VCC - 2 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-16 |
| Category | Power Management ICs |
| Pins | 16 |

## 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 |  |  | 41 | V |  | 4 |
| Collector output voltage |  |  |  | 41 | V |  | 4 |
| Collector output current |  |  |  | 250 | mA |  | 4 |
| Operating junction temperature | TJ |  |  | 150 | °C |  | 4 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 4 |
| Supply voltage | VCC | 7 |  | 40 | V |  | 4 |
| Amplifier input voltage | VI | -0.3 |  |  | V | upper limit printed as VCC, 2 | 4 |
| Collector output voltage | VO |  |  | 40 | V |  | 4 |
| Collector output current (each transistor) |  |  |  | 200 | mA |  | 4 |
| Current into FEEDBACK terminal |  |  |  | 0.3 | mA |  | 4 |
| Timing capacitor | CT | 0.47 |  | 10000 | nF |  | 4 |
| Timing resistor | RT | 1.8 |  | 500 | kΩ |  | 4 |
| Oscillator frequency | fosc | 1 |  | 300 | kHz |  | 4 |
| Operating free-air temperature | TA | -40 |  | 85 | °C | TL594I | 4 |
| Output voltage (REF) |  | 4.95 | 5 | 5.05 | V | IO = 1 mA, TA = 25°C | 5 |
| Reference input regulation |  |  | 2 | 25 | mV | VCC = 7 V to 40 V, TA = 25°C | 5 |
| Reference output regulation |  |  | 14 | 35 | mV | IO = 1 mA to 10 mA, TA = 25°C | 5 |
| Output-voltage change with temperature |  |  | 2 | 10 | mV/V | ΔTA = MIN to MAX | 5 |
| Short-circuit output current |  | 10 | 35 | 50 | mA | Vref = 0 | 5 |
| Input offset voltage, error amplifier |  |  | 2 | 10 | mV | FEEDBACK = 2.5 V | 5 |
| Input offset current |  |  | 25 | 250 | nA | FEEDBACK = 2.5 V | 5 |
| Input bias current |  |  | 0.2 | 1 | µA | FEEDBACK = 2.5 V | 5 |
| Open-loop voltage amplification, error amplifier |  | 70 | 95 |  | dB | ΔVO = 3 V, RL = 2 kΩ, VO = 0.5 V to 3.5 V | 5 |
| Common mode rejection ratio, error amplifier |  | 65 | 80 |  | dB | VCC = 40 V, TA = 25°C | 5 |
| Output sink current, FEEDBACK |  | 0.3 | 0.7 |  | mA | VID = -15 mV to -5 V, FEEDBACK = 0.5 V | 5 |
| Dead-time input bias current |  |  | -2 | -10 | µA | VI = 0 to 5.25 V | 5 |
| Maximum duty cycle, each output |  |  |  | 0.45 |  | DTC = 0 V | 5 |
| Collector off-state current |  |  | 2 | 100 | µA | VC = 40 V, VE = 0 V, VCC = 40 V | 5 |
| Collector off-state current |  |  | 4 | 200 | µA | DTC and OUTPUT CTRL = 0 V, VC = 15 V, VE = 0 V, VCC = 1 V to 3 V | 5 |
| Emitter off-state current |  |  |  | -100 | µA | VCC = VC = 40 V, VE = 0 | 5 |
| Collector-emitter saturation voltage, common emitter |  |  | 1.1 | 1.3 | V | VE = 0, IC = 200 mA | 5 |
| Collector-emitter saturation voltage, emitter follower |  |  | 1.5 | 2.5 | V | VC = 15 V, IE = -200 mA | 5 |
| PWM input threshold voltage, FEEDBACK |  |  | 4 | 4.5 | V | Zero duty cycle | 6 |
| PWM input sink current, FEEDBACK |  | 0.3 | 0.7 |  | mA | FEEDBACK = 0.5 V | 6 |
| UVLO threshold voltage |  | 3.5 |  | 6.9 | V | ΔTA = MIN to MAX | 6 |
| Standby supply current |  |  | 9 | 15 | mA | RT at Vref, all other inputs and outputs open, VCC = 15 V | 6 |
| Standby supply current |  |  | 11 | 18 | mA | RT at Vref, all other inputs and outputs open, VCC = 40 V | 6 |
| Output-voltage rise time, common-emitter |  |  | 100 | 200 | ns | Common-emitter configuration (see Figure 5) | 6 |
| Output-voltage fall time, common-emitter |  |  | 30 | 100 | ns | Common-emitter configuration (see Figure 5) | 6 |
| Output-voltage rise time, emitter-follower |  |  | 200 | 400 | ns | Emitter-follower configuration (see Figure 6) | 6 |
| Output-voltage fall time, emitter-follower |  |  | 45 | 100 | ns | Emitter-follower configuration (see Figure 6) | 6 |
| Junction-to-ambient thermal resistance | RθJA |  | 101.5 |  | °C/W | PW (TSSOP) 16 pins | 4 |
| Junction-to-case (top) thermal resistance | RθJC(top) |  | 29.4 |  | °C/W | PW (TSSOP) 16 pins | 4 |
| Junction-to-board thermal resistance | RθJB |  | 47.3 |  | °C/W | PW (TSSOP) 16 pins | 4 |
| Junction-to-top characterization parameter | ψJT |  | 1.4 |  | °C/W | PW (TSSOP) 16 pins | 4 |
| Junction-to-board characterization parameter | ψJB |  | 46.6 |  | °C/W | PW (TSSOP) 16 pins | 4 |
| Unity-gain bandwidth |  |  | 800 |  | kHz | VO = 0.5 V to 3.5 V, RL = 2 kΩ | 5 |
| Oscillator frequency |  |  | 10 |  | kHz | CT = 0.01 µF, RT = 12 kΩ | 5 |
| Standard deviation of frequency |  |  | 100 |  | Hz/kHz | All values of VCC, CT, RT, and TA constant | 5 |
| Frequency change with voltage |  |  | 1 |  | Hz/kHz | VCC = 7 V to 40 V, TA = 25°C | 5 |
| Frequency change with temperature |  |  | 50 |  | Hz/kHz | ΔTA = MIN to MAX | 5 |
| Output control input current |  |  | 3.5 |  | mA | VI = Vref | 5 |
| UVLO threshold voltage |  |  | 6 |  | V | TA = 25°C | 6 |
| UVLO hysteresis |  |  | 100 |  | mV |  | 6 |
| Average supply current |  |  | 12.4 |  | mA | DTC = 2 V, see Figure 4 | 6 |

## CAD (KiCad official)

- Symbol: `TL594IPWR`
- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`
- 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files: `tl594ipwr-etched.step` / `tl594ipwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl594ipwr.step` / `tl594ipwr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/tl594i.pdf) (37 pp, sha256 `7200510bf66de9b5`, retrieved 2026-10-27, 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](docs/tl594ipwr-datasheet.pdf)