L5970D013TR STMicroelectronics, L5970D013TR Datasheet

IC REG LDO SW STEPDOWN 1A 8-SOIC

L5970D013TR

Manufacturer Part Number
L5970D013TR
Description
IC REG LDO SW STEPDOWN 1A 8-SOIC
Manufacturer
STMicroelectronics
Type
Step-Down (Buck)r
Datasheet

Specifications of L5970D013TR

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
1.2 ~ 35 V
Current - Output
1A
Frequency - Switching
250kHz
Voltage - Input
4.4 ~ 36 V
Operating Temperature
-40°C ~ 150°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Power - Output
750mW
Dc To Dc Converter Type
Step Down
Pin Count
8
Input Voltage
36V
Output Voltage
1.2 to 35V
Switching Freq
275kHz
Output Current
1A
Efficiency
90%
Package Type
SO
Output Type
Adjustable
Switching Regulator
Yes
Load Regulation
15mV
Line Regulation
10mV
Mounting
Surface Mount
Input Voltage (min)
4.4V
Operating Temperature Classification
Automotive
Package
8SO
Minimum Input Voltage
4.4 V
Maximum Input Voltage
36 V
Switching Frequency
275 KHz
Maximum Output Current
1 A
Operating Temperature Range
- 40 C to + 150 C
Mounting Style
SMD/SMT
Duty Cycle (max)
100 %
For Use With
497-8849 - BOARD DEMO STW9N150 100W 3PHASE497-4132 - EVAL BOARD FOR L5970 SERIES
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-3636-2

Available stocks

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Quantity:
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Part Number:
L5970D013TR TEL:88834448
Manufacturer:
ST
0
Part Number:
L5970D013TR,L5970D
Manufacturer:
ST
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Features
Applications
Figure 1.
October 2007
Up to 1A output current
Operating input voltage from 4.4V to 36V
3.3V / (±2%) reference voltage
Output voltage adjustable from 1.2V to 35V
Low dropout operation: 100% duty cycle
250KHz Internally fixed frequency
Voltage feedforward
Zero load current operation
Internal current limiting
Inhibit for zero current consumption
Synchronization
Protection against feedback disconnection
Thermal shutdown
Consumer: STB, DVD, TV, VCR, car radio,
LCD monitors
Networking: XDSL, modems, DC-DC modules
Computer: printers, audio/graphic cards,
optical storage, hard disk drive
Industrial: changers, car battery, DC-DC
converters
CERAMIC
VIN = 4.4V to 35V
10µF
35V
C1
Test application circuit
220pF
3.3V
22nF
C4
C3
SYNC.
COMP
VREF
VCC
4.7K
R3
6
8
2
4
INH.
Up to 1A step down switching regulator
L5970D
3
Rev 16
7
GND
Description
The L5970D is a step down monolithic power
switching regulator capable to deliver up to 1A at
output voltages from 1.2V to 35V.
The device uses an internal P-Channel D-MOS
transistor (with a typical Rdson of 250mΩ) as
switching element to minimize the size of the
external components.
An internal oscillator fixes the switching frequency
at 250KHz.
Having a minimum input voltage of 4.4V only, it is
particularly suitable for 5V bus, available in all
computer related applications.
Pulse by pulse current limit with the internal
frequency modulation offers an effective constant
current short circuit protection.
D98IN954C
1
5
OUT
FB
STPS2L40U
L1 33µH
D1
SO8
5.6K
3.3K
R1
R2
VOUT=3.3V
L5970D
100µF
10V
C2
www.st.com
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Related parts for L5970D013TR

L5970D013TR Summary of contents

Page 1

Features ■ output current ■ Operating input voltage from 4.4V to 36V ■ 3.3V / (±2%) reference voltage ■ Output voltage adjustable from 1.2V to 35V ■ Low dropout operation: 100% duty cycle ■ 250KHz Internally fixed ...

Page 2

Contents Contents 1 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3

L5970D 1 Pin settings 1.1 Pin connection Figure 2. Pin connection (top view) 1.2 Pin description Table 1. Pin description N° Type 1 OUT 2 SYNC 3 INH 4 COMP VREF 7 GND 8 VCC OUT 1 ...

Page 4

Electrical data 2 Electrical data 2.1 Maximum ratings Table 2. Absolute maximum ratings Symbol V Input voltage 8 V Output DC voltage 1 Output peak voltage 0.1µs I Maximum output current Analog pins ...

Page 5

L5970D 3 Electrical characteristics Table 4. Electrical characteristics ( T = 25° 12V, unless otherwise specified Symbol Operating input V CC voltage range Mosfet on R DS(on) Resistance Maximum limiting I l current f Switching frequency ...

Page 6

Electrical characteristics Table 4. Electrical characteristics (continued 25° 12V, unless otherwise specified Symbol I Sink output current o sink I Source bias current b DC open loop gain gm Transconductance Sync function High ...

Page 7

L5970D 4 Typical characteristics Figure 3. Junction temperature vs output current Tj(°C) 130 120 110 100 Vcc=5V 90 Tamb=25° 0.2 0.4 0.6 Figure 5. Junction temperature vs output current Tj(°C) 130 120 110 ...

Page 8

Typical characteristics Figure 9. Quiescent current vs junction temperature Iq (mA) 2 1.8 1.6 Vcc = 12V 1.4 1.2 -50 0 Figure 11. Shutdown current vs junction temperature Ishd (µ Vcc = 12V 50 40 ...

Page 9

... C1206C223K5RAC 22nF, 10%, 50V 5.6K, 1%, 0.1W 0603 3.3K, 1%, 0.1W 0603 4.7K, 1%, 0.1W 0603 STPS2L25U 2A, 25V DO3316P-333 33µH, 2A Application circuit L1 33µH VOUT=3.3V OUT STPS2L25U 5. 3.3K D03IN1437 Description Manufacturer MURATA Sanyo KEMET KEMET Neohm Neohm Neohm STMicroelectronics COILCRAFT C2 100µF 10V 9/16 ...

Page 10

Application circuit Figure 15. PCB layout (component side) Figure 16. PCB layout (bottom side) Figure 17. PCB layout (front side) 10/16 L5970D ...

Page 11

L5970D 6 Application ideas Figure 18. Dual output voltage with auxiliary winding VIN=12V C1 10uF C2 25V 220pF Ceramic Figure 19. Buck-boost regulator VIN=12V C1 C2 10uF 10uF 35V 25V Ceramic Ceramic Vin=12V Vout=-12V Iout=0.5A Efficiency=81% Figure 20. Positive Buck-Boost ...

Page 12

Package mechanical data 7 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 ...

Page 13

L5970D Table 6. SO-8 mechanical data Dim ( ddd 1. Dimensions D does not include mold flash, protru-sions or gate burrs. Mold flash, potrusions or gate burrs shall ...

Page 14

... Order codes 8 Order codes Table 7. Order codes Part number L5970D L5970D013TR 14/16 Package Packaging SO8 SO8 Tape and reel L5970D Tube ...

Page 15

L5970D 9 Revision history Table 8. Revision history Date 26-Jan-2007 16-Mar-2007 16-Oct-2007 Revision 14 Updated Table 5 on page 9 15 Mechanical data typo 16 Updated Section 5: Application circuit on page 9 Revision history Changes 15/16 ...

Page 16

... 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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