TPS61001DGSG4

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

TPS61001DGSG4 application field and working principle

PMIC - Voltage Regulators - DC DC Switching Regulators

The TPS61001DGSG4 is a highly efficient, low quiescent current dc/dc boost converter from Texas Instruments. It is specifically designed to efficiently convert low source voltage from a single-cell Li-ion battery (2.7V) to 3.3V or 5V regulated output. This device is ideal for point-of-load (PoL) regulation of low voltage processors, FPGAs, and low voltage memories. The device includes an enable pin, which is used to enable/disable the regulator. The device is well-suited for space-constrained mobile applications using a LAN cable as a power supply.

The TPS61001DGSG4 is a synchronous step-up DC/DC converter with an input voltage range of 0.8V to 5.5V. Its peak current mode control architecture provides excellent transient response, superior load regulation, and cycle-by-cycle current limit. Its integrated reverse current protection and short-circuit protection reduce external component count yet ensure system reliability and safety. A wide operating range of 1.8V to 12V allows flexibility for different applications.

The TPS61001DGSG4 provides several features to help customize the converter for different applications. An adjustable output voltage (VOUT) is set via a resistor divider from the device output voltage. The device can be enabled/disabled via the ENABLE pin. It also has a soft-start mode and an adjustable switching frequency (1kHz to 2MHz).

The device is optimized to enable high efficiency operation in a very small area. It employs an adaptive on-time control scheme and a low RDS(ON) integrated MOSFET, providing a maximum efficiency of up to 95%. Its low quiescent current reduces the battery consumption significantly, allowing more power to be used by the end application.

The TPS61001DGSG4 is available in a small 16-pin WCSP package, making it suitable for a wide range of applications including mobile communication, medical devices, and portable electronics. The device offers a combination of features, small form factor, and low power consumption.

Applications:

• Point-of-load (PoL) regulation of low voltage processors and FPGAs
• Mobile communication
• Medical devices
• Portable electronics

Features:

• Wide input voltage range (0.8V to 5.5V)
• High peak efficiency: Up to 95%
• Low quiescent current: 2µA
• Low output ripple voltage: 30mVpp
• Low dropout operation: 0.4V for 5V output
• Integrated reverse current protection and short-circuit protection
• Enable/disable control and adjustable switching frequency (1kHz to 2MHz)
• Small 16-pin WCSP package

Working principle:

The TPS61001DGSG4 is configured as a constant frequency, current-mode synchronous, boost converter. The device switches between an idle mode and an active mode, determined by the peak current control and the error amplifier, to regulate the output voltage. When the peak current limit is not disabled and the ready signal is low, the device is in the active mode.

During the active mode, the Power transistor Q1 is enabled, and the inductor current (IL) will ramp up as shown in figure 1. This current is monitored by the peak current control circuit and compared to the fixed reference current ITARGET. When the peak current limit is reached, the power MOSFET Q1 is quickly turned off, and the inductor current will now ramp downwards.

When the power MOSFET Q1 is disabled, its Drain-Source voltage (VDS) will reverse. This will then cause the reverse current to flow through the power MOSFET Q1 into the inductor and back to the input capacitor. To prevent this reverse current, the body diode of power MOSFET Q1 (pMOS) is used. It will enable a "Flyback" voltage due to the energy stored in the inductor in the form of a magnetic field.

The Flyback Voltage is then rectified by the synchronous rectifier, Q2 and then filtered by the output capacitor. The power dissipated in the rectifier is minimized by the low conduction loss of the power MOSFET Q1 with the integrated Schottky diode. The integrated body diode also reduces EMI (Electro-Magnetic Interference) produced by the power MOSFET Q2.

The output voltage of the regulator is determined by the external resistor divider ratio. The device also includes a soft start feature that limits the maximum inductor current to avoid high inrush current when the device is first powered on.

The specific data is subject to PDF, and the above content is for reference