ST L5962 User Manual
Multiple linear/switching voltage regulator for car-radio
Features
■ Step-down synchronous switching voltage
regulator
– Internal high-side/ Low-side NDMOS
–1.2 < V
resistors
– 1.2/2.5 A load current selected through
dedicated pin
– 185 kHz free-run frequency
– SYNC function (220 < f
■ Linear regulators
– 3.3/5 V @ 150 mA standby regulator
selected through dedicated pin
(VSTBYSEL)
– 5/8.5 V @ 350 mA switched linear regulator
enabled and selected through I
(VLR1)
– 3.3/10 V @ 1 A switched linear regulator
enabled and selected through I
(VLR2)
■ 2 High side drivers (0.5 V max drop @ 0.5 A)
enabled through I
protection circuit against:
– short to ground and battery
– loss of ground and battery
– unsupplied short to battery
■ Reset function with configurable delay (RST,
RSTDLY)
2
■ I
C bus
Table 1. Device summary
< 8 V selectable through external
out
< 400 kHz)
sw
2
C bus
2
C bus
2
C bus and equipped with
L5962
PowerSO36 (slug-up)
■ Enable pin to drive switching regulator and I
bus logic
■ Under/over voltage battery detector
(VBATVW)
– Under voltage threshold adjustable through
dedicated pin (LVWIN)
■ Load dump protection
■ Independent thermal protection on all
regulators
Description
L5962 is a very versatile device exploiting BCD
technology characteristics to provide a complete
set of regulated voltages covering all the needs of
a car-radio set.
In standby condition the device guarantees
extremely low quiescent current (90 µA max 40 °C < T < 85 °C) and minimum operating
voltage (4.5 V using an external Schottky diode
for the back-up function).
2
C
Order code Package Packing
L5962 PowerSO36 Tray
L5962TR PowerSO36 Tape and reel
December 2009 Doc ID 16819 Rev 2 1/24
www.st.com
1
Contents L5962
Contents
1 Block and application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Electrical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1 Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1.1 Linear regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1.2 Switching regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2 High side drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5 Operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1 Battery detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6I
2
C bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1 Data validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.2 Start and stop conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.3 Byte format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.4 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7 Software specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2/24 Doc ID 16819 Rev 2
L5962 List of tables
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 4. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 5. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 6. Chip address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 7. IB1 data byte. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 8. VLR2 output level selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 9. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Doc ID 16819 Rev 2 3/24
List of figures L5962
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 4. Low voltage warning high level block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 5. Data validity on the I
Figure 6. Timing diagram on the I
Figure 7. Acknowledge on the I
Figure 8. PowerSO36 (slug-up) mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . 22
2
C bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2
C bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2
C bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4/24 Doc ID 16819 Rev 2
L5962 Block and application diagram
1 Block and application diagram
Figure 1. Block diagram
VINSW
VBATP
SYNCH
LVWIN
VBATVW
RST
RSTDLY
SDA
SCL
EN
Bandgap Reference
External
Storage
POR &
Startup Logic
Oscillator
Clock
UV / OV
Detect
Synch
Logic
Reset &
Delay
I2Cbus
Logic
Ground
Switching
Regulator
Standby
Regulator
Linear
Regulator
#1
Linear
Regulator
#2
HSD
HSD
PH
CBS
CLIM
VFB
VCMP
SOST
VSTBYSEL
VSTBY
VLR1
VINLR2
VLR2
HSD1
HSD2
TAB
SUBS
AGNDPGND
VBAT
AC00428
Doc ID 16819 Rev 2 5/24
Block and application diagram L5962
Figure 2. Application diagram
VDCOUT
22µH
2.2µ
200u/10V
22
TAB 1
1500pF
0.1µF
CBS 3
PGND 2
4.7µ
NC 5
PHASE 4
30µ/35V
NC 6
VBAT
HSD1
HSD1 9
VINsw 8
SUBGND 7
HSD2
VBAT 10
1000u/50 V
HSD2 11
VBATP 12
0.1µ
RSTDLY 13
0.1µ
470µ/25V
0.1µ
0.1µ
1µ
VSTBY
S3
NC 17
NC 18
AGND 16
VSTBY 14
VSTBYS 15
L5962
36 NC
35 NC
34 CLIM
33 VFB
32 VCMP
31 SOST
30 SYNC
29 SCL
28 EN
27 RESET
EN
SCL
S1
47K
+5V
470
3.3nF
2.7nF
22K
75k
1.8nF
22k/(VDCOUT-1)
6/24 Doc ID 16819 Rev 2
SYNC
47K
+5V
RESET
S2
10K
VSTBY
VLR2
26 VLR2
25 VINLR
VBAT
SDA
R1
0.1µ
R2
24 SDA
23 VLR1
22 VBATW
21 LVWIN
20 NC
19 NC
10K
VSTBY
VLR1
VBATW
1µ
0.1µ
1µ
0.1µ
L5962 Pin description
2 Pin description
Figure 3. Pin connection (top view)
Table 2. Pin description
N.C.
N.C.
CLIM
VFB
VCMP
SOST
SYNC
SCL
RST
VLR2
VINLR2
SDA
VLR1
VBATW
LVWIN
N.C.
N.C.
EN
36
35
34
33
32
31
30
29
28
27
26
25
23
22
21
20
19
AC00429
1
TAB
2
PGND
3
CBS
4
PH
5
N.C.
6
N.C.
7
SUBGND
8
VINsw
9
HSD1
10
11
12
1324
14
15
16
17
18
VBAT
HSD2
VBATP
RSTDLY
VSTBY
VSTBYSEL
AGND
N.C.
N.C.
Pin # Pad name Function Description
1 TAB This pin must be connected to GND
2 PGND Switching regulator ground It is the power ground reference
3 CBS Bootstrap for switching regulator
Bootstrap capacitor Input for the switching
regulator
Phase output. It is the switching output of the
4 PH Switching stage output
switching regulator. It also provides phase
reference for bootstrap drive.
5 N.C. Not connected -
6 N.C. Not connected -
7 SUBGND Substrate ground Substrate ground
8 VINsw Switching regulator supply voltage Battery voltage for the switching regulator
st
9 HSD1 High side driver 1 Output of the 1
10 VBAT VLR1/HSD1/HSD2 supply voltage
Voltage input for linear regulator #1 high side
driver and battery warnings
11 HSD2 High side driver 2 Output of the 2
12 VBATP Standby regulator supply voltage
Protected battery input for bias, bandgap,
oscillator, and VSTBY regulator
high side driver
nd
high side driver
13 RSTDLY Reset delay function Input
14 VSTBY Standby regulator output Output of the standby regulator
Doc ID 16819 Rev 2 7/24
Pin description L5962
Table 2. Pin description (continued)
Pin # Pad name Function Description
15 VSTBYSEL Standby regulator selector
Selection input for standby regulator output (3.3 V
or 5 V)
16 AGND Analog ground Analog voltage reference
17 N.C. Not connected -
18 N.C. Not connected -
19 N.C. Not connected -
20 N.C. Not connected -
21 LVWIN Battery detector adjustment input Low-voltage warning input
22 VBATW Battery detector output (open-drain) Battery voltage warning output
st
23 VLR1 Switched linear regulator 1 Output of the 1
24 SDA I
2
C bus data I2C data line
25 VINLR2 VLR2 supply voltage Battery supply for the 2
26 VLR2 Switched linear regulator 2 Output of the 2
linear regulator
nd
linear regulator
nd
linear regulator
27 RST Reset Output
28 EN Enable Active mode enable input. Active high
2
29 SCL I
C bus clock I2C clock source supplied by the master device
30 SYNC Switching regulator SYNC function Synchronization Input
31 SOST Switching regulator soft-start Soft start external capacitor
32 VCMP Switching regulator compensation Feedback compensation input.
33 VFB Switching regulator feedback Regulated output voltage sense
34 CLIM Switching regulator current limit selector Choose between two current limits
35 N.C. Not connected -
36 N.C. Not connected -
8/24 Doc ID 16819 Rev 2
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