1

6

5

10

2

3

7

4

8

9

FB

RC

COMP

DIS/EN

SS

GND

VDD

ISNS

GDRV

BP

DGQ PowerPAD PACKAGE

(Top View)

TPS40210-Q1, TPS40211-Q1

SLVS861D – AUGUST 2008 – REVISED APRIL 2010

www.ti.com

DEVICE INFORMATION

TERMINAL FUNCTIONS

TERMINAL

I/O

DESCRIPTION

NAME

NO.

BP

9

O

Regulator output. Connect a 1.0-mF bypass capacitor from this pin to GND.

COMP

4

O

Error amplifier output. Connect control loop compensation network between COMP pin and FB pin.

Disable/enable. Pulling this pin high places the part into a shutdown mode. Shutdown mode is characterized

by a very low quiescent current. While in shutdown mode, the functionality of all blocks is disabled, and the

DIS/EN

3

I

BP regulator is shut down. This pin has an internal 1-M

Ω pulldown resistor to GND. Leaving this pin

unconnected enables the device.

Error amplifier inverting input. Connect a voltage divider from the output to this pin to set the output voltage.

FB

5

I

Compensation network is connected between this pin and COMP.

GDRV

8

O

Connect the gate of the power N-channel MOSFET to this pin.

GND

6

–

Device ground

Current sense. Connect an external current sensing resistor between this pin and GND. The voltage on this

pin is used to provide current feedback in the control loop and detect an overcurrent condition. An

ISNS

7

I

overcurrent condition is declared when ISNS pin voltage exceeds the overcurrent threshold voltage, 150 mV

typical.

Switching frequency setting. Connect capacitor from RC pin to GND. Connect a resistor from RC pin to VDD

RC

1

I

of the IC power supply and a capacitor from RC to GND.

Soft-start time programming. Connect capacitor from SS pin to GND to program converter soft-start time.

SS

2

I

This pin also functions as a timeout timer when the power supply is in an overcurrent condition.

System input voltage. Connect a local bypass capacitor from this pin to GND. Depending on the amount of

VDD

10

I

required slope compensation, this pin can be connected to the converter output. See Application Information

section for additional details.

10

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