| Regulated outputs (#) | 2 |
| Vin (Min) (V) | 3.6 |
| Vin (Max) (V) | 36 |
| Iout (Max) (A) | 3.2 |
| Rating | Automotive |
| LDO | 1 |
| Iq (Typ) (mA) | 0.155 |
| Features | Eco-mode, Enable, Over Current Protection, Power Good, Thermal Shutdown, UVLO Fixed |
| Processor name | Generic |
| Processor supplier | Generic |
| Shutdown current (ISD) (Typ) (uA) | 2 |
| Configurability | Hardware configurable |
- Qualified for Automotive Applications
- AEC-Q100 Qualified with the Following Results:
- Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
- Device HBM ESD Classification Level 2
- Device CDM ESD Classification Level C4B
- One High-VIN Step-Down DC-DC Converter
- Input Range of 3.6 V to 36 V
- 250-mΩ High-Side MOSFET
- Maximum Load Current 3.2 A, Output Adjustable 1.1 V to 20 V
- Adjustable Switching Frequency 100 kHz to 2.5 MHz
- Synchronizes to External Clock
- High Efficiency at Light Loads With Pulse-Skipping Eco-mode? Control Scheme
- Maximum 140-μA Operating Quiescent Current
- One Low-Dropout Voltage (LDO) Regulator
- Input Range of 3 V to 20 V, With Auto-Source to Balance Efficiency and Lower Standby Current
- 280-mA Current Capability With Typical 35-μA Quiescent Current in No-Load Condition
- Power-Good Output (Push-Pull)
- Low-Dropout Voltage of 300 mV at
IO = 200 mA (Typical)
- Overcurrent Protection for Both Regulators
- Overtemperature Protection
- 14-Pin HTSSOP Package With PowerPAD? Integrated Circuit Package
The TPS65320D-Q1 device is a combination of a high-VIN DC-DC step-down converter, referred to as the buck regulator, with an adjustable switch-mode frequency from 100-kHz to 2.5-MHz, and a high-VIN 280-mA low-dropout (LDO) regulator. The input range is 3.6 V to 36 V for the buck regulator, and 3 V to
36 V for the LDO regulator. The buck regulator has an integrated high-side MOSFET. The LDO regulator features a low-input supply current of 45-μA typical in no-load, also has an integrated MOSFET with an active-low, push-pull reset output pin. The input supply of the LDO regulator auto-source from the output of the buck regulator when it is in operation. Low-voltage tracking feature enables TPS65320D-Q1 to track the input supply during cold-crank conditions.
The buck regulator provides a flexible design to fit system needs. The external loop compensation circuit allows for optimization of the converter response for the appropriate operating conditions. A low-ripple pulse-skip mode reduces the no-load input-supply current to maximum 140 μA.
The device has built-in protection features such as soft start, current-limit, thermal sensing and shutdown due to excessive power dissipation. Furthermore, the device has an internal undervoltage-lockout (UVLO) function that turns off the device when the supply voltage is too low.
