Data Sheet
TPS7C84-Q1 Automotive, 150mA, 40V, Adjustable, Low-Dropout Regulator With Power-Good
1 Features
- AEC-Q100 qualified for automotive
applications:
- Temperature grade 1: −40°C to +125°C, TA
- Junction temperature: −40°C to +150°C, TJ
- Wide input voltage range:
- VIN range: 2.1V to 40V
- Wide output voltage range
(VOUT):
- Fixed option: 3.3V, 5.0V
- Adjustable option: 1.2V to 39V
- Output current: Up to 150mA
- VOUT accuracy:
- ±1% over line, load, and temperature
- Quiescent current (IQ) : 45μA (typical)
- Low dropout: 350mV (typical)
- Open-drain, power-good output
- Output current limiting and thermal shutdown
- Stable over a wide range of ceramic output capacitor values:
- COUT range: 1μF to 100μF
- ESR range: 0Ω to 2Ω
- Package options:
- D (8-pin SOIC)
- DRB (8-pin VSON)
2 Applications
Dropout Voltage vs Temperature (VIN = 4.9V, IOUT = 150mA)
3 Description
The TPS7C84-Q1 is a wide input, low-dropout regulator (LDO) supporting a 2.1V to 40V input voltage range and up to 150mA of load current. The TPS7C84-Q1 has both fixed and adjustable output types. Fixed output options include 3.3V and 5V. The output is able to be set between 1.2V and 39V with the adjustable device.
This device has a power-good (PG) output that monitors the voltage at the feedback pin to indicate the status of the output voltage. The EN input and PG output sequence multiple power supplies in the system.
The TPS7C84-Q1 is designed for up to 40V VIN battery-connected applications. The wide output voltage range allows the device to generate the bias voltage for silicon carbide (SiC) gate drivers and microphones as well as power MCUs and processors.
The device is available in both an SOIC package and a small VSON package with wettable flanks that facilitates a compact printed circuit board (PCB) design. The low thermal resistance enables sustained operation despite significant dissipation across the device.
Package Information
| PART NUMBER | PACKAGE(1) | PACKAGE SIZE(2) |
|---|---|---|
| TPS7C84-Q1 | D (SOIC, 8) | 4.9mm × 6mm |
| DRB (VSON, 8) | 3mm × 3mm |
(1) For more information, see the Mechanical, Packaging, and Orderable Information.
(2) The package size (length × width) is a nominal value and
includes pins, where applicable.
Typical Application Circuit4 Pin Configuration and Functions
Figure 4-1 D Package,8-Pin SOIC(Top View)
Figure 4-2 DRB Package,8-Pin VSON(Top View)
Table 4-1 Pin Functions
| PIN | TYPE(1) | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| EN | 7 | I | Enable pin. The device is disabled when the enable pin becomes lower than the enable logic input low level (VIL). To make sure the device is enabled, drive the EN pin above the logic high level (VIH). Do not leave this pin floating because this pin is high impedance. If this pin is left floating, the pin state becomes undefined and the device potentially enables or disables. |
| FB/NC | 2 | I | This pin is a feedback pin when using an external resistor divider or an NC pin when using the device with a fixed output voltage. When using the adjustable device, connect this pin through a resistor divider to the output for the device to function. See the Feedback Resistor Selection section for more information. If using a fixed output, leave this pin floating or connected to GND. |
| GND | 5 | — | Ground |
| IN | 8 | I | Input power-supply voltage pin. For best transient response and to minimize input impedance, use the recommended value or larger ceramic capacitor from IN to ground. See the Recommended Operating Conditions table and the Input and Output Capacitor Requirements section. Place the input capacitor as close to the input of the device as possible. TEST |
| NC | 3, 4 | — | No internal connection. Leave this pin floating or tied to GND for best thermal performance. |
| OUT | 1 | O | Regulated output voltage pin. A capacitor is required from OUT to GND for stability. For best transient response, use the nominal recommended value or larger ceramic capacitor from OUT to GND. Place the output capacitor as close to the device output as possible. See the Input and Output Capacitor Requirements section for more details. |
| PG | 6 | O | Active-high, open-drain power-good output. This pin goes low when VOUT drops by 6% of the nominal value. |
(1) I = input; O = output.
5 Specifications
5.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)(1)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| IN | Continuous input voltage | –0.3 | 42 | V |
| OUT | Output voltage | –0.3 | VIN+0.3(3) | V |
| EN | EN input voltage | –0.3 | 42 | V |
| PG | PG comparator output voltage(2) | –0.3 | 42 | V |
| FB | FEEDBACK input voltage | –0.3 | 5 | V |
| TJ | Operating junction temperature | –40 | 150 | °C |
| Tstg | Storage temperature | –65 | 150 | °C |
(1) Operation outside the Absolute Maximum Ratings may cause permanent device damage. Absolute Maximum Ratings do not imply functional operation of the device at these or any other conditions beyond those listed under Recommended Operating Conditions. If used outside the Recommended Operating Conditions but within the Absolute Maximum Ratings, the device may not be fully functional, and this may affect device reliability, functionality, performance, and shorten the device lifetime
(2) Can exceed input supply voltage.
(3) The absolute maximum rating is VIN + 0.3V or 42V, whichever is smaller.
5.2 ESD Ratings
| VALUE | UNIT | ||||
|---|---|---|---|---|---|
| V(ESD) | Electrostatic discharge | Human body model (HBM), per AEC Q100-002(1) | ±2500 | V | |
| Charged-device model (CDM), per AEC V Q100-011 | All pins | ±1000 | |||
| Corner pins | ±1000 | ||||
(1) AEC Q100-002 indicates that HBM stressing shall be in accordance with the ANSI/ESDA/JEDEC JS-001 specification.
5.3 Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
| MIN | NOM | MAX | UNIT | ||
|---|---|---|---|---|---|
| VIN | Input voltage | 2.1 | 40 | V | |
| VEN | Enable voltage | 0 | 40 | V | |
| VOUT | Output voltage | 1.2 | 39 | V | |
| IOUT | Output current | 0 | 150 | mA | |
| COUT | Output capacitor(1) | 1 | 2.2 | 100 | µF |
| COUT ESR | Output capacitor ESR | 0 | 2 | Ω | |
| CIN | Input capacitor | 1 | µF | ||
| CFF | Feed-forward capacitor (optional(2), for adjustable device only) | 10 | pF | ||
| IFB_DIVIDER | Feedback divider current(2) (adjustable device only) | 12 | µA | ||
| TJ | Junction temperature | –40 | 150 | °C | |
(1) Effective output capacitance of 0.5µF minimum required for stability.
(2) CFF required for stability if the feedback divider current < 12µA. Feedback divider current = VOUT / (R1 + R2). See the Feed-Forward Capacitor (CFF) section for details.
