V

= V - VQ1 + V(C ) - VQ4 = V - VQ1 + 2.5 V - VQ4 = 5 V

(Ideal)

OUT

IN

F

IN

VIN

OFF

ON

ON

OFF

VOUT

CF

COUT

+

-

2.5V

VQ1

Q1

Q2

Q3

Q4

VIN

OFF

ON

ON

OFF

VOUT

CF

COUT

+

-

2.5V

Q1

Q2

Q3

Q4

TPS60150

www.ti.com

SLVS888C – DECEMBER 2008 – REVISED OCTOBER 2015

7 Detailed Description

7.1 Overview

The TPS60150 regulated charge pump provides a regulated output voltage for various input voltages. The

TPS60150 device regulates the voltage across the flying capacitor to 2.5 V and controls the voltage drop of Q1

and Q2 while a conversion clock with 50% duty cycle drives the FETs.

Figure 3. Charging Mode

During the first half cycle, Q2 and Q3 transistors are turned on and flying capacitor, CF, will be charged to 2.5 V

ideally.

Figure 4. Discharging Mode

During the second half cycle, Q1 and Q4 transistors are turned on. Capacitor CF will then be discharged to

output.

Use Equation 1 to calculate the output voltage.

(1)

The output voltage is regulated by output feedback and an internally compensated voltage control loop.

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