ST1S03APUR STMicroelectronics, ST1S03APUR Datasheet

ST1S03APUR

Manufacturer Part Number

ST1S03APUR

Description

IC REG SW 1.5A 1.5MHZ SD DFN-6D

Manufacturer

STMicroelectronics

Type

Step-Down (Buck)r

Datasheet

1.ST1S03APUR.pdf (14 pages)

Specifications of ST1S03APUR

Internal Switch(s)

Yes

Synchronous Rectifier

Number Of Outputs

Current - Output

1.5A

Frequency - Switching

1.5MHz

Voltage - Input

3 ~ 5.5 V

Operating Temperature

0°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

6-DFN

Output Voltage

7 V

Output Current

1.5 A

Input Voltage

- 0.3 V to + 7 V

Switching Frequency

1.5 MHz

Operating Temperature Range

0 C to + 125 C

Mounting Style

SMD/SMT

Duty Cycle (max)

87 %

For Use With

497-6375 - BOARD EVAL BASED ON ST1S03A497-6374 - BOARD EVAL BASED ON ST1S03A497-6369 - BOARD EVAL BASED ON ST1S03497-6368 - BOARD EVAL BASED ON ST1S03

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Voltage - Output

Power - Output

Lead Free Status / Rohs Status

Lead free / RoHS Compliant

Other names

497-6902-2
ST1S03APUR

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

BOSTOCK HK LIMITED

Part Number:

ST1S03APUR

Manufacturer:

Company:

Allchip Electronic(HK) Limited

Part Number:

ST1S03APUR

Manufacturer:

STS

Quantity:

9 934

Current page: 1 of 14
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Features

■

Description

The ST1S03A is a step down DC-DC converter

optimized for powering low-voltage digital core in

HDD applications and, generally, to replace the

high current linear solution when the power

dissipation may cause an high heating of the

application environment. It provides up to 1.5 A

over an input voltage range of 3 V to 5.5 V. An high

switching frequency (1.5 MHz) allows the use of

tiny surface-mount components: as well as the

resistor divider to set the output voltage value,

only an inductor, a schottky diode and two

capacitors are required. Besides, a low output

ripple is guaranteed by the current mode PWM

topology and by the use of low ESR SMD ceramic

capacitors. The device is thermal protected and

current limited to prevent damages due to

accidental short circuit. The ST1S03A is available

in DFN6D (3x3 mm).

Table 1.

June 2008

Step-down current mode PWM (1.5 MHz) DC-

DC converter

2 % DC output voltage tolerance

Internal soft start for start-up current limitation

and power on delay of 50-100 µs

Typical efficiency: > 85 %

Inhibit function

1.5 A output current capability

Not switching quiescent current: max 1.5 mA

over temperature range

Switch V

Uses tiny capacitors and inductors

Available in DFN6D 3x3 exposed pad

ST1S03AIPUR

ST1S03APUR

Order codes

Device summary

: max 200 mV @ I

1.5 A, 1.5 MHz adjustable, with inhibit function

= 750 mA

Tape and reel

Packaging

Rev 6

step-down switching regulator

DFN6D (3x3 mm)

Package

ST1S03A

www.st.com

1/14

Related parts for ST1S03APUR

ST1S03APUR Summary of contents

Page 1

... The device is thermal protected and current limited to prevent damages due to accidental short circuit. The ST1S03A is available in DFN6D (3x3 mm). Table 1. Device summary Order codes ST1S03APUR ST1S03AIPUR June 2008 1.5 A, 1.5 MHz adjustable, with inhibit function step-down switching regulator = 750 mA SW Packaging ...

Page 2

Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3

Diagram Figure 1. Schematic diagram Diagram 3/14 ...

Page 4

Pin configuration 2 Pin configuration Figure 2. Pin configuration (top view) ST1S03A Table 2. Pin description Pin n° Symbol GND IN_SW V 5 IN_A 6 N.C./INH 4/14 Name and function Voltage of ...

Page 5

Maximum ratings Table 3. Absolute maximum ratings Symbol V Positive power supply voltage IN_SW V Positive power supply voltage IN_A V Max voltage of inhibit pin INH SWITCH Max voltage of output pin Voltage V Feedback voltage FB I ...

Page 6

Electrical characteristics 4 Electrical characteristics Table 5. Electrical characteristics ( IN_SW IN_A INH otherwise specified. Typical values are referred to 25 °C) Symbol Parameter FB Feedback voltage I V pin bias current Quiescent ...

Page 7

Typical application Figure 3. Application circuits Typical application 7/14 ...

Page 8

Application notes 6 Application notes The ST1S03A is an adjustable current mode PWM step-down DC-DC converter with internal 1.5 A power switch, packaged in a 6-lead DFN 3x3 mm. It’s a complete 1.5 A switching regulator with its internal compensation ...

Page 9

Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK These packages have a lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box ...

Page 10

Package mechanical data Dim. Min 0.23 D 2.90 D2 2.23 E 2. 0.30 10/14 DFN6D (3x3 mm) mechanical data mm. Typ. Max. 1.00 0.02 0.05 0.20 0.45 3.00 3.10 2.50 ...

Page 11

Tape & Reel QFNxx/DFNxx (3x3) Mechanical Data mm. Dim. Min. Typ 12 3.3 Bo 3 Max. Min. 330 13.2 0.504 0.795 2.362 18 Package mechanical data ...

Page 12

Package mechanical data Figure 4. DFN6 (3x3 mm) footprint recommended data 12/14 ...

Page 13

Revision history Table 6. Document revision history Date Revision 04-May-2006 1 06-Jun-2006 2 29-May-2007 3 12-Mar-2008 4 16-May-2008 5 03-Jun-2008 6 Changes First release. Table 3 has been updated. Add new mechanical data DFN6D and order codes updated. Added: ...

Page 14

... Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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