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PDF L5963 Data sheet ( Hoja de datos )
| Número de pieza | L5963 | |
| Descripción | Dual monolithic switching regulator | |
| Fabricantes | STMicroelectronics | |
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L5963
Dual monolithic switching regulator with LDO and HSD
'!0'03
PowerSSO-36
(exposed pad)
'!0'03
PowerSSO-36
(slug-up)
Features
Two step-down synchronous switching voltage
regulators with internal power switches:
– Wide input voltage range (from 3.5 V to 26 V)
– Internal high-side/ low-side NDMOS
– 1 V minimum output
– 3.0 A load current
– 250 kHz free-run frequency
– 250 kHz < f < 2 MHz synchronization range
– Integrated soft-start
– Independent hardware enable pins
– Independent power supply
– 180° PWM output phase shift
– Programmable switching frequency divider
by 1, 2, 4 or 8 between the two DC/DC
regulators
– Power good function
One standby / linear regulator
– Output voltage programmable with external
resistor divider
– 250 mA maximum current capability
– Backup function
– Power good function
One high side driver
– 0.5 V max drop @ 0.5 A
– Protected against short to ground and
battery, loss of ground and battery,
unsupplied short to battery
Programmable under voltage battery detector
– Under voltage threshold adjustable through
dedicated pin (VDIN)
Load dump protection
Independent thermal protection on all
regulators
Independent current limit on all regulators
Datasheet - production data
Extremely low quiescent current in standby
conditions
Power good / adjustable voltage detector
outputs to realize customized power up/down
sequences
Description
L5963 is a dual step-down switching regulator
with internal power switches, high side driver and
a low drop-out linear regulator that can operate as
standby regulator or normal LDO.
All the regulators can be connected directly to the
vehicle battery. In addition to an adjustable
voltage detector, voltage supervisors are
available.
The two DC-DC converters can work in free-run
condition or synchronize themselves to an
external clock. DC/DCs' PWM outputs have a
180° phase shift.
The high operating frequency allowed by the
synchronization input helps to reduce AM and FM
interferences and grants the use of small and low
cost inductors and capacitors.
This IC finds application in the automotive
segment, where load dump protection and wide
input voltage range are mandatory.
A slug-up package option is available for
applications which require heatsink use.
In standby condition the device guarantees
extremely low quiescent current (25 μA typical @
-40 °C < T < 85 °C)
Table 1. Device summary
Order code
Package
Packing
L5963D-EHX
L5963D-EHT
L5963U-KBX
L5963U-KBT
PowerSSO36
(exposed pad)
PowerSSO36
(slug-up)
Tube
Tape & Reel
Tube
Tape & Reel
October 2015
This is information on a product in full production.
DocID028553 Rev 1
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www.st.com
1 page  
L5963
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Example of a typical application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Example of usage of two regulators in the same application . . . . . . . . . . . . . . . . . . . . . . . . 9
Pinout configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
PSSR LDO 50 mA load vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Efficiency vs. output current (VIN = 14 V, fsw = 2 MHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Efficiency vs. output current (VIN = 14 V, fsw = 250 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . 16
Low voltage warning monitor & delay schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Linear regulator diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Enable timing for standby regulator (ENLDO pin connect to supply directly) . . . . . . . . . . . 20
Enable timing for linear regulator (pin ENLDO isn't connected to VINLDO) . . . . . . . . . . . . 21
Switching regulators diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Closed loop system with TYPE III network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
TYPE III compensated network diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Layout configuration example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
PowerSSO-36 (exposed pad) package outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
PowerSSO-36 (slug-up) package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
PowerSSO-36 (exp. pad) marking information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
PowerSSO-36 (slug up) marking information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
DocID028553 Rev 1
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L5963
Pins description
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
Name
TAB
PGND1
ENSW1
BS1
PWM1
ENHSD
VINSW1
SYNCOUT
SYNCIN
FRDIV
VDOUT
FBSW1
COMP1
SGND
VDIN
VINHSD
HSD
VDDLY
FBLDO
VOUTLDO
LDOOK
LDOOKDLY
VINLDO
COMP2
FBSW2
SWGND
VBAT
SW1OKDLY
TEST
SW1OK
VINSW2
ENLDO
PWM2
BS2
ENSW2
PGND2
Table 2. Pins description
Type
Function
n.a.
Ground
Device slug terminal. To be connected to ground
Switching regulator 1 power ground
Input
Switching regulator 1 enable. 1.8/3.3 V compatible
Supply
Switching regulator 1 boosted supply
Output
Switching regulator 1 switching output
Input
Enable for High Side Driver. 1.8/3.3 V compatible
Supply
Switching regulator 1 supply voltage
Output
External synchronization output (push-pull)
Input
External synchronization input DRAFT
Input/output Switching frequency divider setting
Output
Voltage detector output (open drain)
Input/output Switching regulator 1 feedback voltage
Input/output Switching regulator 1 compensation
Ground
Ground for linear blocks
Input
Voltage detector threshold setting
Supply
High Side Driver supply
Output
High Side Driver output
Input/output Voltage Detector delay setting
Input/output LDO feedback voltage
Output
LDO output
Output
LDO voltage detector output (open drain)
Input/output LDOOK delay setting
Supply
LDO supply
Input/output Switching regulator 2 compensation
Input/output Switching regulator 2 feedback voltage
Ground
Low-power switching ground
Supply
Common linear blocks supply voltage
Input/output SW1OK delay setting
n.a. Pin for testing purposes. To be left unconnected
Output
Switching regulator 1 voltage detector output (open drain)
Supply
Switching regulator 2 supply voltage
Input
LDO enable. 1.8/3.3 V compatible
Output
Switching regulator 2 switching output
Supply
Switching regulator 2 boosted supply
Input
Switching regulator 2 enable. 1.8/3.3 V compatible
Ground
Switching regulator 2 power ground
DocID028553 Rev 1
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11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet L5963.PDF ] | |
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