)

R

R

(

I

V

V

L

MAX

_

DSON

MAX

_

OUT

MIN

_

OUT

MIN

_

IN

+

´

+

=

(1)

ENABLE

SHORT-CIRCUIT PROTECTION

THERMAL SHUTDOWN

UNDERVOLTAGE LOCKOUT

CLOCK DITHERING

TYPICAL CHARACTERISTICS

TPS62700, TPS62701

offers a low input-to-output voltage difference. This is particularly useful in battery-powered applications to

achieve longest operation time by taking full advantage of the entire battery voltage range. The minimum input

voltage to maintain regulation depends on the load current and output voltage, and can be calculated as:

With:

The device is enabled by setting the EN pin to high and at first the internal circuits are settled. Afterwards the

device activates the soft start circuit and ramps up the output voltage. The output voltage is ramped up from 0 V

to 3.09 V within typically 190

µs after the EN pin changes from low to high. A low signal at the EN pin sets the

device in Shutdown Mode with less than 2

µA current consumption.

short circuit on the output occurs. When the High-Side MOSFET switch reaches its current limit, it is turned off,

and the Low-Side MOSFET switch is turned on. The High-Side MOSFET switch can only turn on again, after the

current in the Low-Side MOSFET switch decreases below its current limit.

mode, the High-Side and Low-Side MOSFETs are turned-off. The device continues its operation when the

junction temperature falls by typical 20°C.

The device stops operation at typ. 1.5 V with falling input voltage and starts operation at typ. 1.7 V with rising

input voltage. This prevents malfunction of the device due to low input voltage.

In order to reduce switch frequency harmonics in the higher RF bands, the TPS62701 has a built-in

clock-dithering circuit.

Typical Characteristic Graphs

FIGURE

Switching Frequency

Figure 1

Figure 2

Figure 3

vs Temperature

Figure 4

Figure 5

EN High Threshold Voltage

Figure 6

Efficiency

vs Output Current

Figure 7

Efficiency

vs Output Current

Figure 8

Efficiency

vs Output Voltage

Figure 9

Efficiency

vs Output Voltage

Figure 10

6

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