ST1S03PU STMICROELECTRONICS [STMicroelectronics], ST1S03PU Datasheet

no-image

ST1S03PU

Manufacturer Part Number
ST1S03PU
Description
1.5A, 1.5 MHz adjustable, step-down switching regulator in DFN6
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ST1S03PU
Manufacturer:
ST
Quantity:
320
Part Number:
ST1S03PU
Manufacturer:
ST
0
Part Number:
ST1S03PUP
Manufacturer:
RENESAS
Quantity:
2 864
Part Number:
ST1S03PUR
Manufacturer:
POWER-ONE
Quantity:
8
Part Number:
ST1S03PUR
Manufacturer:
ST
Quantity:
8 000
Part Number:
ST1S03PUR
Manufacturer:
ST
0
Part Number:
ST1S03PUR
Manufacturer:
ST
Quantity:
3 679
Part Number:
ST1S03PUR
0
Part Number:
ST1S03PUR/ST1S03
Manufacturer:
ST
0
Features
Description
The ST1S03 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 1.5A
Order codes
March 2007
1.5A, 1.5 MHz adjustable, step-down switching regulator in DFN6
Step-down current mode PWM (1.5MHz)
DC-DC converter
2% DC output voltage tolerance
Internal soft start for START-UP current
limitation and power on delay of 50-100µs
Typical efficiency: > 70% over all operating
conditions
1.5A Output current capability
Not switching quiescent current: max 2.5mA
over temperature range
Switch V
Uses tiny capacitors and inductors
Available in DFN 3x3 exposed pad
Part number
DS
ST1S03PM
ST1S03PU
: max 350mV @ I
SW
=750mA
ST1S03PMR
ST1S03PUR
Packaging
Rev. 5
over an input voltage range of 3V to 16V. An high
switching frequency (1.5MHz) 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 E.S.R. SMD
ceramic capacitors. The device is thermal
protected and current limited to prevent damages
due to accidental short circuit. The ST1S03 is
available in DFN6.
DFN6 (3x3mm)
DFN6D (3x3 mm)
DFN6 (3x3 mm)
Package
ST1S03
www.st.com
1/17
17

Related parts for ST1S03PU

ST1S03PU Summary of contents

Page 1

... PWM topology and by the use of low E.S.R. SMD ceramic capacitors. The device is thermal protected and current limited to prevent damages due to accidental short circuit. The ST1S03 is available in DFN6. Packaging ST1S03PMR ST1S03PUR Rev. 5 ST1S03 DFN6 (3x3mm) Package DFN6 (3x3 mm) DFN6D (3x3 mm) 1/17 www ...

Page 2

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

Page 3

ST1S03 1 Diagram Figure 1. Schematic diagram Diagram 3/17 ...

Page 4

Pin configuration 2 Pin configuration Figure 2. Pin connections (top view) Table 1. Pin description Pin N° Symbol GND IN_SW 5 V IN_A 6 N.C. 4/17 Name and function Voltage of Feedback ...

Page 5

ST1S03 3 Maximum ratings Table 2. Absolute maximum ratings Symbol V Positive Power Supply Voltage I_SW V Positive Power Supply Voltage I_SW SWITCH Voltage Max Voltage of output pin V Feedback Voltage FB I Common mode input voltage VFB T ...

Page 6

Electrical characteristics 4 Electrical characteristics Table 4. Electrical characteristics ( 125°C, unless otherwise specified. Typical values are referred to 25°C) J Symbol Parameter FB Feedback voltage PSRR Feedback PSRR I V Pin bias current FB FB ...

Page 7

ST1S03 5 Application notes The ST1S03 is an adjustable current mode PWM step-down DC/DC converter with internal 1.5A power switch, packaged in 6-lead DFN 3x3. It’s a complete 1.5A switching regulator with its internal compensation eliminating additional component. The constant ...

Page 8

Typical application 6 Typical application Figure 3. Application circuits 8/17 ST1S03 ...

Page 9

ST1S03 7 Typical performance characteristics (L1=3.3µ 4.7µ Figure 4. Load voltage feedback vs temp. Figure 6. Line output voltage regulation vs temperature Figure 8. Voltage feedback vs output current Figure 9. Typical performance characteristics = 22µF, ...

Page 10

Typical performance characteristics Figure 10. Quiescent current vs temperature Figure 12. Minimum operating voltage vs output voltage Figure 14. Efficiency vs output current 10/17 Figure 11. Quiescent current vs input voltage Figure 13. Efficiency vs temperature Figure 15. Switch V ...

Page 11

ST1S03 Figure 16. Switch RDS-ON vs temperature Figure 18. Load transient response V =5V, I =100mA to 780mA, C =4.7µ L=3.3µH, T =38µs, T =25° Figure 20. Start-Up transient ...

Page 12

Package mechanical data 8 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and ...

Page 13

ST1S03 DIM. MIN 0.33 D 2.90 D2 1.92 E 2. 0.20 DFN6 (3x3) MECHANICAL DATA mm. TYP MAX. 1.00 0.05 0.75 0.20 0.43 3.00 ...

Page 14

Package mechanical data DIM. MIN 0.23 D 2.90 D2 2.23 E 2. 0.30 14/17 DFN6D (3x3) MECHANICAL DATA mm. TYP MAX. 1.00 0.02 0.05 0.20 0.45 3.00 3.10 2.50 3.00 ...

Page 15

ST1S03 Tape & Reel QFNxx/DFNxx (3x3) MECHANICAL DATA DIM. MIN 12 mm. TYP MAX. MIN. 330 13.2 0.504 0.795 2.362 18.4 3.3 3.3 1 Package mechanical ...

Page 16

Revision history 9 Revision history Table 5. Revision history Date Revision 11-Nov-2004 1 08-Feb-2005 2 03-Mar-2005 3 13-Jul-2005 4 29-Mar-2007 5 16/17 First Release. Maturity Change. Mistake on Figure changed 125 ==> 150°C on Table 3. J ...

Page 17

ST1S03 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 ...

Related keywords