SC4503TSKTRT Semtech, SC4503TSKTRT Datasheet - Page 4

• Manufacturer Part Number: SC4503TSKTRT
• Description: IC SW REG STEP-UP 1.4A TSOT23-5
• Manufacturer: Semtech
• Type: Step-Up (Boost), Sepicr

Specifications of SC4503TSKTRT

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: Adj to 27V
• Current - Output: 1.4A
• Frequency - Switching: 1.3MHz
• Voltage - Input: 2.5 ~ 20 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-5, TSOT-5, TSOP-5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: SC4503TSKTR

 2007 Semtech Corp.
Pin Confi guration - 2mm X 2mm MLPD
POWER MANAGEMENT
Pin Descriptions - 2X2mm MLPD-W
EDP
Pin
1,2
6,7
3
4
5
8
SHDN/SS
SHDN/SS
SW
SW
SW
SW
IN
IN
8-LEAD 2X2mm MLPD-W
Pin Name
SHDN/SS
1
1
2
2
3
3
4
4
GND
N.C.
SW
FB
IN
Top View
Collector of the internal power transistor. Connect to the boost inductor and the free-
wheeling diode. The maximum switching voltage spike at this pin should be limited to
34V.
Power Supply Pin. Bypassed with capacitor close to the pin.
Shutdown and Soft-start Pin. Pulling this pin below 0.4 shuts down the converter. Apply-
ing more than 2V at this pin enables the SC4503. An external resistor and an external
capacitor connected to this pin soft-start the switching regulator. The SC4503 will try
to pull the SHDN/SS pin below its 1.4V switching threshold regardless of the external
circuit attached to the pin if VIN is below the under-voltage lockout threshold. Tie this pin
through an optional resistor to IN or to the output of a controlling logic gate if soft-start is
not used. See Applications Information for more details.
The inverting input of the error amplifi er. Tie to an external resistive divider to set the
output voltage.
Ground. Tie to ground plane.
No Connection.
Solder to the ground plane of the PCB.
Pin Functions
8
8
7
7
6
6
5
5
GND
GND
GND
GND
NC
NC
FB
FB
4
Notes:
(1) Available in tape and reel only. A reel contains 3,000 devices.
(2) Available in lead-free package only. Device is WEEE and
RoHS compliant.
Ordering Information
SC4503_MLPD EVB
SC4503WLTRT
Device
(1,2)
Top Mark
E00
Evaluation Board
www.semtech.com
SC4503
2mmX2mm
Package
MLPD-W