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PDF ( 数据手册 , 数据表 ) L5954

零件编号 L5954
描述 Multiple multifunction voltage regulator
制造商 STMicroelectronics
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L5954 数据手册, 描述, 功能
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L5954
Multiple multifunction voltage regulator for car radio
Features
5 regulators:
– 10 V (350 mA)
– 8.5 V (175 mA)
– 5 V (350 mA)
– 5 V (250 mA)
– 8 V/10 V (1 A)
All regulators are low dropout
3 high side drivers:
– 2 A (HSD1)
– 0.45 A (HSD2 and HSD3)
No external charge pump capacitors are
required
Standby mode controlled by 3 input pins:
– Enable for Reg2 and Reg3
– I2C bus for Reg1, Reg4, Reg5, Hsd1, Hsd2,
Hsd3
Individual thermal shutdown
Independent current limiting
Short circuit protection
Load dump protection and overvoltage
shutdown
ESD protected
Multiwatt15
Description
The L5954 is an integration of three high side
drivers and five regulators developed to provide
the power for an audio system.
The outputs of the IC are controlled via the I2C
bus and the Enable input.
External protection must be provided for reverse
battery protection.
Table 1.
Device summary
Order code
L5954
Package
Multiwatt15
Packing
Tube
July 2010
Doc 17717 Rev 1
1/15
www.st.com
1







L5954 pdf, 数据表
Electrical specifications
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L5954
Table 4.
Symbol
Electrical characteristics (continued)
Parameter
Test Condition
8/10 V/1 A Reg 4 output
VREG4 Output voltage
ΔVline Line regulation
ΔVload Load regulation
VDROPOUT Dropout voltage
Ilim4 Current limit
SVR Ripple rejection
5 V/250 mA Reg 5 output
VREG5 Output voltage
ΔVline Line regulation
ΔVload Load regulation
VDROPOUT Dropout voltage
Ilim5 Current limit
SVR Ripple rejection
2 A HSD1
Vsat Output saturation voltage
Ileak1
Ilim
Output leakage current
Current limiting
IREG4 = 1 A
b5 = 0
b5 = 1
11 V VBAT 26 V, b5 = 1
(Measure Δ VREG2 across VBAT
Range)
5 mA IREG4 1 A
(Measure VBAT- VREG2 when
VREG2 drops 0.1 V)
IREG4 = 1 A
IREG4 = 5 mA
-
fo = 1 kHz, VBAT = 14 V
with 1 Vpp AC, IREG4 = 500 mA
IREG5 = 250 mA
7 V VBAT 26 V
(Measure Δ VREG5 across VBAT
Range)
5 mA IREG5 250 mA
(Measure VBAT- VREG5 when
VREG5 drops 0.1 V)
IREG5 = 250 A
IREG5 = 5 mA
-
fo = 1 kHz, VBAT = 14 V
with 1Vpp AC, IREG5 = 125 mA
IHSD1 = 1 A continuous time
operation
All driver outputs are off
RHSD1 = 0.5 Ω
Min. Typ. Max. Unit
7.6 8 8.4
9.50 10 10.5
V
V
- - 50 mV
- - 150 mV
--
950 mV
600 mV
1.3 - 2.4 A
50 -
- dB
4.6 5 5.4 V
- - 40 mV
- - 100 mV
--
1.6 V
1.2 V
320 - 700 mA
50 -
- dB
- - 0.5 V
-50 - 50 µA
2.4 - 4 A
8/15 Doc 17717 Rev 1














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