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L6996D 데이터시트 PDF




STMicroelectronics에서 제조한 전자 부품 L6996D은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 L6996D 기능
기능 DINAMICALLY PROGRAMMABLE SYNCHRONOUS STEP DOWN CONTROLLER FOR MOBILE CPUs
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L6996D 데이터시트, 핀배열, 회로
L6996
DINAMICALLY PROGRAMMABLE SYNCHRONOUS
STEP DOWN CONTROLLER FOR MOBILE CPUs
s 5 BIT DAC WITH AVAILABLE EXTERNAL
OUTPUT VOLTAGE.
s 0.6 TO 1.750V, DYNAMICALLY ADJUSTABLE
OUTPUT VOLTAGE RANGE.
s ±1% OUTPUT ACCURACY OVER LINE AND LOAD.
s ACTIVE DROOP.
s CONSTANT ON TIME TOPOLOGY ALLOWS
LOW DUTY CYCLE AND FAST LOAD
TRANSIENT.
s 90% EFFICIENCY FROM 12V TO 1.35V/8A.
s 1.750V TO 28V BATTERY INPUT RANGE.
s OPERATING FREQUENCY UP TO 1MHZ.
s INTEGRATED HIGH CURRENT DRIVERS.
s LATCHED OVP AND UVP PROTECTIONS.
OCP PROTECTION.
s 350µA TYP. QUIESCENT CURRENT.
s 7µA TYP. SHUTDOWN SUPPLY CURRENT.
s PGOOD AND OVP SIGNALS.
s ZERO-CURRENT DETECTION AND PULSE-
FREQUENCY MODE.
APPLICATIONS
s ADVANCED MOBILE CPUs SUPPLY WITH
DYNAMIC TRANSITIONS.
s NOTEBOOK/LAPTOP, CONCEPT PC CPUs
SUPPLY.
s DC/DC FROM BATTERY SUPPLY EQUIPMENTS.
APPLICATION DIAGRAM
5V
TSSOP24
ORDERING NUMBERS: L6996D (TSSOP24)
L6996DTR (Tape & Reel)
DESCRIPTION
The device is dc-dc controller specifically designed to
provide extremely high efficiency conversion for mo-
bile advanced microprocessors.
The "constant on-time" topology assures fast load
transient response. The embedded "voltage feedfor-
ward" provides nearly constant switching frequency
operation.
A precise 5-bit DAC allows select output voltage from
0.6V to 1V with 25mV steps and from 1V to 1.75V
with 50mV steps.
L6996 is capable of supporting CPUs VID combina-
tion changing during normal operation.
The active droop allows adjust both the output load-
line slope and the zero-load output voltage.
25V
July 2002
OSC
BOOT
HGATE
PGOOD
PHASE
OVP
LGATE
L6996
ILIM
PGND
GND
CS+
CS-
CSS
SS
VFB-
VFB+
HS
LS
DS
5V
L RSENSE VOUT
1.25V
SHDN
VID4:0
VPROG
CVPROG
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L6996D pdf, 반도체, 판매, 대치품
L6996
ELECTRICAL CHARACTERISTICS
(VCC = VDR = 5V; Tamb = 0°C to 70°C unless otherwise specified)
Symbol
Parameter
Test Condition
SUPPLY SECTION
Vin Input voltage range
Vout=1V Fsw=110Khz Iout=1A
Vcc, VDR
Vccoff Turn-off voltage
VHYST UVLO Hysteresys
Iqcc Quiescent current driver
(VDR)
VFB- > VFB+
Iqcc Quiescent current
(Vcc)
VFB- > VFB+
SHUTDOWN SECTION
SHDN SHDN Threshold
ISH Driver quiescent current in
(VDR) shutdown.
SHDN to GND
ISH (Vcc) Shut down current
SHDN to GND
SOFT START SECTION
ISS SS charge current
Soft-start active range
ON TIME
Ton On time duration
Vprog=CS- =1.15 Osc=250mV
Vprog=CS-=1.15 Osc=500mV
Vprog=CS-=1.15 Osc=1V
Vprog=CS-=1.15 Osc=2V
OFF TIME
Minimum Off Time
KOSC/TOFFMIN
OSC=250mV VPROG=CS-=1.15V
DAC
Vprog Voltage Accuracy
VID0-4 see table 1
PWM COMPARATOR
Input voltage offset
VPROG=1.6V=VFB-
IVFB- Input bias current (VP)
VVFB- =1.6V
CURRENT LIMIT AND ZERO CURRENT COMPARATOR
ILIM ILIM input bias current
CS-=VPROG=1.6V
ILIM to GND = 120K
KC Positive and negative Current
Limit factor.
RILIM = 120 K
PHASE- Zero Crossing Comparator offset
GND
GATE DRIVERS
High side rise time
High side fall time
VDR=5V; C=7nF
HGATE - PHASE from 2 to 4.5V
Low side rise time
Low side fall time
PROTECTIONS
OVP Over voltage trip
CS- rising
Min. Typ. Max. Unit
1 28 V
4.5 5.5 V
4.1 4.3 V
60 90 100 mV
20 µA
600 µA
0.6 1.2 V
5 µA
15 µA
4 6 µA
0.9 V
720 800 880
355 420 485
210 250 290
120 150 180
ns
ns
ns
ns
580
0.28
ns
-1 +1 %
-2 +2 mV
4 5 6 µA
4.95 µA
0.18 0.3 0.24 µA
-2 2 mV
50 70
50 70
50 70
50 70
117 120 123
ns
ns
ns
ns
%
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L6996D 전자부품, 판매, 대치품
L6996
TYPICAL OPERATING CHARACTERISTICS
The test conditions refer to the component list the table 5. VIN = 20V VOUT = 1.8V FSW = 270kHz Tamb = 25°C
unless otherwise noted.
Figure 2. Dynamic Output Voltage Transition
1.55V -> 1.35V
Figure 5. Startup with Zero Load
CH1 -> VPHASE
CH2 -> VOUT
CH4 -> IL
CH1 -> VOUT
CH2 -> SS
CH3 -> IL
Figure 3. Dynamic Output Voltage Transition
1.35V -> 1.55V
Figure 6. Startup with 10A
CH1 -> VPHASE
CH2 -> VOUT
CH4 -> IL
CH1 -> VOUT
CH2 -> SS
CH3 -> IL
Figure 4. Load Transient 0-15A
CH1 -> VOUT
CH2 -> VOUT
CH4 -> IL
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부품번호상세설명 및 기능제조사
L6996

DINAMICALLY PROGRAMMABLE SYNCHRONOUS STEP DOWN CONTROLLER FOR MOBILE CPUs

STMicroelectronics
STMicroelectronics
L6996D

DINAMICALLY PROGRAMMABLE SYNCHRONOUS STEP DOWN CONTROLLER FOR MOBILE CPUs

STMicroelectronics
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