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L4988 데이터시트 PDF




STMicroelectronics에서 제조한 전자 부품 L4988은 전자 산업 및 응용 분야에서
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부품번호 L4988 기능
기능 Low drop voltage regulator
제조업체 STMicroelectronics
로고 STMicroelectronics 로고


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L4988 데이터시트, 핀배열, 회로
L4988
Low drop voltage regulator
Features
Datasheet production data
Max DC supply voltage
Max output voltage tolerance
Max dropout voltage
Output current
Quiescent current
VS
V0
Vdp
I0
Iqn
1. Typical value with watchdog disabled.
40V
+/-2%
500 mV
200 mA
75 µA(1)
Operating DC supply voltage range 5.6V to
31V
Reset circuit sensing the output voltage down
to 1V
Programmable reset pulse delay with external
capacitor
Watchdog
Programmable watchdog timer with external
capacitor
Enable input for enabling/disabling the
watchdog functionality
Thermal shutdown and short circuit protection
Wide temperature range (Tj = -40°C to 150°C)
'!0'#&4
SO-8
'!0'#&4
SO-20
Description
The L4988 is a monolithic integrated 5V voltage
regulator with a low drop voltage at currents up to
200mA. The output voltage regulating element
consists in a p-channel MOS and the regulation is
performed regardless of input voltage transients
up to 40V. The high precision of the output voltage
is obtained with a pre-trimmed reference voltage.
The L4988 is protected against short circuit and
an over-temperature protection switches off the
device in case of extremely high power dissipa-
tion. The L4988 is active when the Enable is high.
State of the art features like reset and watchdog
make this device particularly suitable to supply
microprocessor systems in automotive
applications.
Table 1. Device summary
Package
SO8
SO20 (16+2+2)
Tube
L4988D
L4988MD
Order codes
Tape & reel
L4988DTR
L4988MDTR
September 2013
This is information on a product in full production.
Doc ID 13617 Rev 6
1/32
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L4988 pdf, 반도체, 판매, 대치품
List of figures
List of figures
L4988
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.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Figure 26.
Figure 27.
Figure 28.
Figure 29.
Figure 30.
Figure 31.
Figure 32.
Figure 33.
Figure 34.
Figure 35.
Figure 36.
Figure 37.
Figure 38.
Figure 39.
Figure 40.
Figure 41.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pins configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Output voltage vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Output voltage vs. Vs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Drop Voltage vs. Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Current consumption vs. Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Current consumption vs. Input Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Current limitation vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Current limitation vs. Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Short Circuit Current vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Short Circuit Current vs. Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
VWEn_high vs. Tj. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
VWEN_LOW vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Vrhth vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Vrlth vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Vwhth vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Vwlth vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Icr & Icwc vs. Tj. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Idr & Icwd vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Twop vs. Tj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
PSRR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Load regulation test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Maximum load variation response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
L4988 application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Behavior of output current versus regulated voltage Vo . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Reset timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Watchdog timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SO-8 PC board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
SO-8 Rthj-amb Vs. PCB copper area in open box free air condition . . . . . . . . . . . . . . . . . 19
SO-8 thermal impedance junction ambient single pulse . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SO-8 thermal fitting model of a single channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SO-20 PC board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
SO-20 Rthj-amb Vs. PCB copper area in open box free air condition . . . . . . . . . . . . . . . . 22
SO-20 thermal impedance junction ambient single pulse . . . . . . . . . . . . . . . . . . . . . . . . . 23
SO-20 thermal fitting model of a single channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
SO-8 package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
SO-20 package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
SO-8 tube shipment (no suffix) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
SO-8 tape and reel shipment (suffix “TR”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
SO-20 tube shipment (no suffix) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
SO-20 tape and reel shipment (suffix “TR”) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4/32 Doc ID 13617 Rev 6

4페이지










L4988 전자부품, 판매, 대치품
L4988
2 Electrical
specifications
Electrical specifications
2.1
Absolute maximum ratings
Table 3. Absolute maximum ratings
Symbol
Parameter
Value
Unit
VVsdc
DC supply voltage
-0.3 to 40
V
IVsdc
VVo
Input current
DC output voltage
Internally limited
-0.3 to 6(1)
V
IVo DC output current
Internally limited
VWi Watchdog input voltage
-0.3 to VVo + 0.3
V
Vod Open Drain output voltage
-0.3 to VVo + 0.3
V
Iod Open Drain output current
Internally limited
Vcr Reset delay voltage
-0.3 to VVo + 0.3
V
Vcw Watchdog delay voltage
-0.3 to VVo + 0.3
V
VWEn
Watchdog Enable input voltage
-0.3 to VVo +0.3
V
Tj Junction temperature
-40 to 150
“C
VESD
ESD voltage level (HBM-MIL STD 883C)
±2 kV
VESD
ESD voltage level (CDM AEC-Q100-011)
750 V
1. Using the typical application schematic with Cout= 10 µF and Iout=0 A, when the regulator is switched-on,
an overshoot exceeding 6 V could occur.This behavior does not impact the reliability of the regulator.
2.2 Thermal
data
Table 4. Thermal data
Symbol
Parameter
Rth-jamb Thermal resistance junction to ambient
1. With copper area 2 cm2 ; for details see Figure 29.
2. With copper area 6 cm2 ; for details see Figure 33.
S08
130(1)
S016+2+2 Unit
51(2)
°C/W
Doc ID 13617 Rev 6
7/32

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관련 데이터시트

부품번호상세설명 및 기능제조사
L4981

POWER FACTOR CORRECTOR

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L4981A

POWER FACTOR CORRECTOR

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