Thermal

Shutdown

UVLO

Current

Limit

2

µA

Overshoot

Detect

500k

Quickstart

1.193V

Bandgap

IN

EN

NR

OUT

GND

400

Ω

Thermal

Shutdown

UVLO

Current

Limit

3.3M

Ω

Overshoot

Detect

500k

1.193V

Bandgap

IN

EN

FB

OUT

GND

400

Ω

DDC (TSOT-23-5) PACKAGE

(TOP VIEW)

OUT

NR

IN

GND

EN

1

2

3

5

4

DRV (SON-6) PACKAGE

(TOP VIEW)

IN

N/C

EN

6

5

4

OUT

FB

GND

1

2

3

GND

N/C – No internal connection

TPS79901-Q1, TPS79912-Q1, TPS79915-Q1

TPS79918-Q1, TPS79925-Q1, TPS79927-Q1, TPS79933-Q1

SBVS097E

– MARCH 2008 – REVISED JANUARY 2012

www.ti.com

DEVICE INFORMATION

FUNCTIONAL BLOCK DIAGRAMS

Figure 1. Fixed-Voltage Version

Figure 2. Adjustable-Voltage Version

PIN CONFIGURATIONS

Table 1. PIN DESCRIPTIONS

PIN

NO.

DESCRIPTION

NAME

DDC

DRV

IN

1

6

Input supply

GND

2

3, Pad

Ground. The pad must be tied to GND.

Driving the enable pin (EN) high turns on the regulator. Driving this pin low puts the regulator into

EN

3

4

shutdown mode. EN can be connected to IN if not used.

Fixed-voltage versions only; connecting an external capacitor to this pin bypasses noise generated by

NR

4

2

the internal bandgap. This capacitor allows output noise to be reduced to very low levels.

Adjustable version only; this pin is the input to the control loop error amplifier, and is used to set the

FB

4

2

output voltage of the device.

Output of the regulator. A small capacitor (total typical capacitance

≥ 2 μF ceramic) is needed from

OUT

5

1

this pin to ground to ensure stability.

N/C

—

5

Not internally connected. This pin must either be left open or tied to GND.

4

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Copyright

© 2008–2012, Texas Instruments Incorporated

Product Folder Link(s): TPS79901-Q1 TPS79912-Q1 TPS79915-Q1 TPS79918-Q1 TPS79925-Q1 TPS79927-Q1

TPS79933-Q1