PM8834

The STMicroelectronics PM8834 is a highly integrated power management IC (PMIC) designed for use in various applications, including consumer electronics, industrial devices, and battery-powered systems. This device is particularly well-suited for managing power in systems that require efficient voltage regulation and power distribution. The PM8834 is known for its versatility, high efficiency, and compact design, making it an ideal choice for modern electronic applications.

### Overview

The PM8834 is a dual-output, step-down (buck) converter that can efficiently convert a higher input voltage to lower output voltages. It features a wide input voltage range, making it compatible with various power sources, including batteries and wall adapters. The device is designed to provide stable output voltages with minimal ripple, ensuring reliable operation in sensitive electronic circuits.

### Key Features

1. Dual Output: The PM8834 can provide two independent output voltages, allowing it to power multiple components in a system from a single IC.

2. Wide Input Voltage Range: The device operates over a wide input voltage range, typically from 4.5V to 28V, making it suitable for various power supply sources.

3. High Efficiency: The PM8834 is designed for high efficiency, often exceeding 90%, which helps to minimize heat generation and prolong battery life in portable applications.

4. Low Quiescent Current: The device features a low quiescent current, which is particularly beneficial for battery-powered applications, as it helps to extend battery life during standby periods.

5. Adjustable Output Voltage: The output voltages can be easily adjusted using external resistors, providing flexibility in meeting specific application requirements.

6. Integrated Protection Features: The PM8834 includes several protection features, such as overcurrent protection (OCP), thermal shutdown (TSD), and under-voltage lockout (UVLO), ensuring safe and reliable operation.

7. Compact Package: The device is available in a compact package, which is ideal for space-constrained applications.

8. Soft-Start Functionality: The PM8834 includes a soft-start feature that limits inrush current during startup, reducing stress on the power supply and connected components.

### Specifications

- Input Voltage Range: 4.5V to 28V
- Output Voltage Range: Adjustable from 0.8V to 15V (depending on external resistor configuration)
- Maximum Output Current: Up to 3A per channel
- Efficiency: Typically > 90% at full load
- Quiescent Current: Typically 20 µA
- Switching Frequency: 300 kHz (typical)
- Overcurrent Protection: Yes
- Thermal Shutdown: Yes
- Under-Voltage Lockout: Yes
- Operating Temperature Range: -40°C to 125°C
- Package Type: Available in a compact 16-pin HTSSOP package.

### Pin Configuration

The PM8834 is typically available in a 16-pin HTSSOP package. The pin configuration includes:

1. VIN: Input voltage supply pin.
2. GND: Ground pin.
3. VOUT1: Output voltage pin for the first output.
4. VOUT2: Output voltage pin for the second output.
5. SW1: Switch node for the first buck converter.
6. SW2: Switch node for the second buck converter.
7. COMP1: Compensation pin for the first converter.
8. COMP2: Compensation pin for the second converter.
9. FB1: Feedback pin for the first output voltage.
10. FB2: Feedback pin for the second output voltage.
11. CSN1: Current sense pin for the first output.
12. CSN2: Current sense pin for the second output.
13. SS: Soft-start pin.
14. EN1: Enable pin for the first output.
15. EN2: Enable pin for the second output.
16. PGND: Power ground pin.

### Applications

The PM8834 is suitable for a wide range of applications, including:

- Consumer Electronics: Used in smartphones, tablets, and portable devices for efficient power management.
- Industrial Equipment: Ideal for powering sensors, actuators, and control circuits in industrial automation systems.
- Battery-Powered Devices: Suitable for applications requiring efficient power conversion to extend battery life.
- Telecommunications: Employed in communication devices and networking equipment for reliable power distribution.

### Conclusion

The STMicroelectronics PM8834 is a versatile and efficient power management IC that offers a range of features suitable for various applications. With its dual output capability, wide input voltage range, high efficiency, and integrated protection features, the PM8834 is an excellent choice for designers