TPS7133QDRG4

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TPS7133QDRG4 application field and working principle

The TPS7133QDRG4 is a family of linear voltage regulators designed for use in power management and portable equipment applications. This family of devices, available in 1.2V (TPS7133QD8RG4) and 1.5V (TPS7133QD9RG4) versions, features low quiescent current, fast and precise voltage regulation, and high output current capability. Each member of the family consists of voltage regulator core, reference, and support circuitry. When enabled and programmed with the correct output voltage, output current and circuit design, these devices provide stable and accurate voltage regulation over a wide range of load, line, and temperature conditions.

Applications

• Personal and portable electronics
• Communications infrastructure
• Industrial applications
• Smart home and utility automation

Design Features

• Low quiescent current: 40 µA
• Input voltage range: 2.4V to 6.0V
• Output voltage range: 1.2V to 5V
• Output current upto 1000mA
• Programmable soft start
• Over-current protection
• Output voltage tolerant to input transients
• Power management: shutdown, sleep mode
• Thermal overload protection

Working Principle

The TPS7133QDRG4 family of voltage regulators is a linear voltage regulator with an on-chip voltage reference. An internal voltage reference provides a stable, accurate output voltage that is insensitive to load or line variations. A low dropout (LDO) style regulator is used to draw power from the input supply, which allows the output voltage to remain stable even with wide variations in input voltage. The regulator is protected against short-circuit and over-current conditions by an internal current limit circuit.

The regulator is programmable through external resistor divider values for various output voltages. The programming resistor-divider is also used for setting the current limit. A hysteresis control circuit prevents undesired oscillations at light load conditions. A soft-start amplifier can be used to control the rate of increase in the output voltage during start-up.

The TPS7133QDRG4 is designed for low-power applications and typically offers a quiescent current of 40µA at light loads. The device also features a power-saving sleep mode to further reduce power consumption at light loads. The device typically features an accuracy within ±2% of the specified output voltage over the specified temperature range.

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