SIP12503DMP-T1-E3 データシートの表示（PDF） - Vishay Semiconductors

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SIP12503DMP-T1-E3

500-mA - Adjustable Boost Converter for Single or Dual Cell

Vishay Semiconductors 

SiP12503

Vishay Siliconix

PIN CONFIGURATION AND TRUTH TABLE

PowerPAK MLP33-6

XSHD

1

VIN

2

VOUT

3

6

LX

5

GND

4

FB

Top View

ORDERING INFORMATION

Part Number

SiP12503DMP-T1-E3

Temperature Range

- 40 °C to 85 °C

Marking

2503

PIN DESCRIPTION

Pin Number Name

Function

1

XSDH Logic controlled shutdown Input, XSHD = high: normal operation, XSHD = low: shutdown

2

VIN

Input voltage

3

VOUT Output of the boost converter and power source for the IC-battery

4

FB

Output voltage feedback pin

5

GND Signal and power ground

6

LX

Switch pin

PIN FUNCTIONS

XSHD (Pin 1)

XSHD is a logic-level shutdown control pin. When XSHD is

low, the IC’s switching is disabled, and an antiringing switch

is connected between LX and VIN. When XSHD is high, the

IC is working in normal operation.

VIN (Pin 2)

VIN is the pin connected to battery input voltage. At start-up,

SiP12503 is powered from the voltage at the VIN pin. Once

VOUT exceeds VIN, the SiP12503 is powered from VOUT.

This increases the drive to the gate of the internal power

switch, to allow higher maximum output currents and higher

converter efficiency.

VOUT (Pin 3)

VOUT is the output of the boost converter and also the power

source for the IC.

FB (Pin 4)

FB is the output voltage feedback pin via an external resistor

divider. The feedback voltage is nominally 0.6 V.

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4

GND (Pin 5)

GND is the ground pin for signal and power ground.

LX (Pin 6)

LX connects to the drain of the internal power MOSFET

(boost switch). Externally, the LX pin should be connected to

the boost inductor and Schottky diode. If the inductor current

falls to zero, or XSHD is low, an internal antiringing switch is

short from LX to VIN to minimize EMI.

Document Number: 73579

S09-1454-Rev. B, 03-Aug-09

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