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L5962
Voltage regulator with dc-dc plus switchable linear regulators controlled by I2C bus
September 2013 Doc ID 16819 Rev 3 1/24
L5962Multiple linear/switching voltage regulator for car-radio
Features Step-down synchronous switching voltage
regulator Internal high-side/ Low-side NDMOS
–1.2 < Vout < 8 V selectable through external
resistors 1.2/2.5 A load current selected through
dedicated pin 185 kHz free-run frequency SYNC function (220 < fsw < 400 kHz) 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 I2 C bus
(VLR1) 3.3/10 V @ 1 A switched linear regulator
enabled and selected through I2 C bus
(VLR2) 2 High side drivers (0.5 V max drop @ 0.5 A)
enabled through I2 C bus and equipped with
protection circuit against: short to ground and battery loss of ground and battery unsupplied short to battery Reset function with configurable delay (RST,
RSTDLY)I2 C bus Enable pin to drive switching regulator and I2C
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
DescriptionL5962 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 - °C < T < 85 °C) and minimum operating
voltage (4.5 V using an external Schottky diode
for the back-up function).
Table 1. Device summary
Contents L59622/24 Doc ID 16819 Rev 3
Contents Block and application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Electrical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Device description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154.1 Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1.1 Linear regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1.2 Switching regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2 High side drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185.1 Battery detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2 C bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196.1 Data validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.2 Start and stop conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.3 Byte format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.4 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Software specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
L5962 List of tables
Doc ID 16819 Rev 3 3/24
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
List of figures L5962
4/24 Doc ID 16819 Rev 3
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 I2 C bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 6. Timing diagram on the I2 C bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 7. Acknowledge on the I2 C bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 8. PowerSO36 (slug-up) mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . 22
L5962 Block and application diagram
Doc ID 16819 Rev 3 5/24 Block and application diagram
Figure 1. Block diagram
Block and application diagram L5962
Figure 2. Application diagram
L5962 Pin description
Doc ID 16819 Rev 3 7/24
2 Pin description
Figure 3. Pin connection (top view)
Table 2. Pin description
Pin description L5962
8/24 Doc ID 16819 Rev 3
Table 2. Pin description (continued)
L5962 Electrical specification
Doc ID 16819 Rev 3 9/24
3 Electrical specification
3.1 Absolute maximum ratings
3.2 Thermal data
3.3 Electrical characteristics
VBAT= VINSW = VINLR2 = 14.4 V, Tamb = 25 °C unless otherwise specified.
(
Table 3. Absolute maximum ratings
Table 4. Thermal data
Table 5. Electrical characteristics
Electrical specification L5962
10/24 Doc ID 16819 Rev 3
Table 5. Electrical characteristics (continued)
L5962 Electrical specification
Doc ID 16819 Rev 3 11/24
Table 5. Electrical characteristics (continued)
Electrical specification L5962
12/24 Doc ID 16819 Rev 3
Table 5. Electrical characteristics (continued)
