L4962E/A STMicroelectronics, L4962E/A Datasheet

IC REG SW 1.5A VERT 7-HEPTAWATT

L4962E/A

Manufacturer Part Number
L4962E/A
Description
IC REG SW 1.5A VERT 7-HEPTAWATT
Manufacturer
STMicroelectronics
Type
Step-Down (Buck)r
Datasheet

Specifications of L4962E/A

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
5.1 ~ 40 V
Current - Output
1.5A
Frequency - Switching
100kHz
Voltage - Input
9 ~ 46 V
Operating Temperature
0°C ~ 125°C
Mounting Type
Through Hole
Package / Case
Heptawatt-7 (Vertical, Bent and Staggered Leads)
Power - Output
15W
Output Voltage
40 V
Output Current
1.5 A
Input Voltage
9 V to 46 V
Switching Frequency
85 KHz to 115 KHz
Operating Temperature Range
- 40 C to + 150 C
Mounting Style
Through Hole
Duty Cycle (max)
100 %
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-2943-5

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
L4962E/A
Manufacturer:
ST
0
Part Number:
L4962E/A ST05+
Manufacturer:
ST
0
Part Number:
L4962E/A-3
Manufacturer:
ST
0
DESCRIPTION
The L4962 is a monolithic power switching regula-
tor delivering 1.5A at a voltage variable from 5V to
40V in step down configuration.
Features of the device include current limiting, soft
start, thermal protection and 0 to 100% duty cycle
for continuous operating mode.
BLOCK DIAGRAM
June 2000
1.5A OUTPUT CURRENT
5.1V TO 40V OUTPUT VOLTAGE RANGE
PRECISE ( 2%) ON-CHIP REFERENCE
HIGH SWITCHING FREQUENCY
VERY HIGH EFFICIENCY (UP TO 90%)
VERY FEW EXTERNAL COMPONENTS
SOFT START
INTERNAL LIMITING CURRENT
THERMAL SHUTDOWN
®
1.5A POWER SWITCHING REGULATOR
The L4962 is mounted in a 16-lead Powerdip plastic
package and Heptawatt package and requires very
few external components.
Efficient operation at switching frequencies up to
150KHz allows a reduction in the size and cost of
external filter components.
ORDERING NUMBERS : L4962/A (12 + 2 + 2 Powerdip)
POWERDIP
(12 + 2 + 2)
L4962E/A (Heptawatt
L4962EH/A (Horizontal
Pin X = Powerdip
Pin (X) = Heptawatt
HEPTAWATT
Vertical)
Heptawatt)
L4962
1/16

L4962E/A Summary of contents

Page 1

... The L4962 is mounted in a 16-lead Powerdip plastic package and Heptawatt package and requires very few external components. Efficient operation at switching frequencies up to 150KHz allows a reduction in the size and cost of external filter components. L4962 HEPTAWATT L4962E/A (Heptawatt Vertical) L4962EH/A (Horizontal Heptawatt) Pin X = Powerdip Pin (X) = Heptawatt 1/16 ...

Page 2

L4962 ABSOLUTE MAXIMUM RATINGS Symbol V Input voltage Input to output voltage difference Negative output DC voltage 2 Output peak voltage 0 100KHz Voltage ...

Page 3

PIN FUNCTIONS (cont’d) HEPTAWATT POWERDIP 12 ELECTRICAL CHARACTERISTICS (Refer to the test circuit, T specified) Symbol Parameter DYNAMIC CHARACTERISTICS V Output voltage range o ...

Page 4

L4962 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter DYNAMIC CHARACTERISTICS (cont’d) f Switching frequency f Voltage stability of switching frequency Temperature stability of switching frequency Maximum operating max switching frequency T Thermal shutdown sd junction temperature ...

Page 5

CIRCUIT OPERATION (refer to the block diagram) The L4962 is a monolithic stepdown switching regu- lator providing output voltages from 5.1V to 40V and delivering 1.5A. The regulation loop consists of a sawtooth oscilla- tor, error amplifier, comparator and the ...

Page 6

L4962 Figure 3. Test and application circuit (Powerdip BYW98 or 3A Schottky diode, 45V of VRRM CORE TYPE - MAGNETICS 58120 - A2 MPP 1 N TURNS 45, WIRE GAUGE: 0.8mm (20 AWG) ...

Page 7

Figure 7. Quiescent drain current vs. junction tem- perature (100% duty cycle) Figure 10. Open loop fre- quency and phase re- sponse of error amplifier Figure 13. Switching fre- quency vs. R2 (see test circuit) Figure 8. Reference voltage (pin ...

Page 8

L4962 Figure 16. Supply voltage ripple rejection vs. frequency Fig ure 19. Effi ciency vs. output current F igu re 22. Effi ciency vs. output voltage 8/16 Figure 17. Dropout voltage between pin 7 and pin 2 vs. current at ...

Page 9

APPLICATION INFORMATION Figure 25. Typical application circuit EKR (ROE BYW98 OR VISK340 (SCHOTTKY) 1 SUGGESTED INDUCTORS COGEMA 946043 OR U15, GUP15, 60 TURNS 1mm, AIR GAP 0.8mm ...

Page 10

L4962 APPLICATION INFORMATION (continued) Figure 27 minimal 5.1V fixed regulator; Very few component are required * COGEMA 946043 (TOROID CORE) 969051 (U15 CORE) ** EKR (ROE) Figure 28. Programmable power supply V = 5.1V to 15V o I ...

Page 11

APPLICATION INFORMATION (continued) Figure 29. DC-DC converter 5.1V/4A, 12V/1A. A suggestion how to synchronize a negative output L1 COGEMA 946043 (969051 COGEMA 946044 (946045) Figure 30. In multiple supplies several L4962s can be synchronized as shown ...

Page 12

L4962 MOUNTING INSTRUCTION The Rth-j-amb of the L4962 can be reduced by soldering the GND pins to a suitable copper area of the printed circuit board (Fig. 32). The diagram of figure 33 shows the R function of the side ...

Page 13

DIM. MIN. TYP. MAX. MIN. a1 0.51 0.020 B 0.85 1.40 0.033 b 0.50 b1 0.38 0.50 0.015 D 20.0 E 8.80 e 2.54 e3 17.78 F 7.10 I 5.10 L 3.30 Z 1.27 inch MECHANICAL DATA TYP. MAX. ...

Page 14

L4962 mm DIM. MIN. TYP. MAX. A 4.8 C 1.37 D 2.4 2.8 0.094 D1 1.2 1.35 0.047 E 0.35 0.55 0.014 E1 0.7 0.97 0.028 F 0.6 0.8 0.024 F1 0.9 G 2.34 2.54 2.74 0.095 G1 4.88 5.08 ...

Page 15

DIM. MIN. TYP. MAX. MIN. A 4.8 C 1.37 D 2.4 2.8 0.094 D1 1.2 1.35 0.047 E 0.35 0.55 0.014 F 0.6 0.8 0.024 F1 0.9 G 2.41 2.54 2.67 0.095 G1 4.91 5.08 5.21 0.193 G2 7.49 ...

Page 16

... No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. © ...

Related keywords