Synchronous Step-Down DC/DC Converter with Built-In LDO Regulator In Series plus Voltage Detector

Preliminary

$ Detector (2.7V product)

Test Conditions :

Unless otherwise stated;

* VROUT(T) : Setting Output Voltage

DC/DC : VIN=3.6V [@ DCOUT:2.2V]

VD : VIN=6.0V

VR : VIN = VROUT(T) + 1.0 (V) [When VROUT(T) <1.4V, VIN =2.4V]

note 1 : VD operates when in stand-by mode.

note 2 : Including hysteresis operating voltage range.

note 3 : On resistance = 0.05V / ILX

note 4 : EFFI = { ( Output Voltage x Output Current ) / ( Input Voltage x Input Current) } x 100

note 5 : Time until it short-circuits DCOUT with GND through 1

Ω of resistance from a state of operation

and is set to DCOUT=0V from current limit pulse generating.

note 6 : Vdif = (VIN1

note 7 : VIN 1 = The input voltage when VROUT1 appears as input voltage is gradually decreased.

note 8 : VROUT1 = A voltage equal to 98% of the output voltage whenever an amply stabilized IOUT {VROUT(T) + 1.0V} is input.

--

mA

9

Ta=25

XC9510 Series

CONDITIONS

PARAMETER

SYMBOL

VDOUT=0.5V

VD Output Current

IVD

1

V

8

UNITS

MIN.

TYP.

MAX.

2.700

58

2.646

3

2.754

-

TEST CIRCUIT

-

%

Hysteresis Range

VHYS

Detect Voltage

VDF

Output Voltage

! VDF

-40

±100

-

ppm

/

8

Temperature Characteristics

Semiconductor Ltd.

Data Sheet

5