TPS62050DGS datasheet(19/30 Pages) TI1

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PGND

VIN

LBO

GND

SYNC

LBI

TPS62050

L1 = 10

µH

VO = 0.7 V / 600 mA

R1 = 270 k

Ω

C(ff) = 22 pF

R2 = 680 k

Ω

Co = 47 µF

Ci = 10 µF

VI = 2.7 V to 7 V

100

0.01

0.1

100

1 k

IL − Load Current − mA

VI = 2.7 V

VI = 3.3 V

VI = 5 V

SYNC = L

VO = 1.8 V

TA = 25 C

VI = 7.2 V

VI = 10 V

100

0.01

0.1

100

1 k

IL − Load Current − mA

VI = 2.7 V

SYNC = H

VO = 1.8 V

TA = 25 C

VI = 5 V

VI = 3.3 V

VI = 10 V

VI = 7.2 V

TPS62050, TPS62051, TPS62052, TPS62054, TPS62056

www.ti.com

SLVS432F – SEPTEMBER 2002 – REVISED JUNE 2015

10.2.2.2 Detailed Design Procedure

Connect the feedback pin (FB) to the pad of the output capacitor. The pullup resistors for pins PG and LBO are

typically chosen as 100 k

Ω each. The input capacitor must be placed as close to the VIN pin as possible.

10.2.2.3 Application Curves

Figure 21. TPS62054 Efficiency vs Load Current in PFM

Figure 22. TPS62054 Efficiency vs Load Current in PWM

Mode

10.3 System Examples

The TPS62050 device is used to generate an output voltage of 0.7 V. With such low output voltages, the inductor

discharges very slowly. This leads to a high-output voltage ripple in power-save mode (SYNC = GND).

Therefore, TI recommends using a larger output capacitor to keep the output ripple low. With an output capacitor

of 47 µF, the output voltage ripple is less than 40 mVPP.

Figure 23. Converter for 0.7-V Output Voltage

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