參數(shù)資料
型號： L6997S
廠商： 意法半導(dǎo)體
英文描述： STEP DOWN CONTROLLER FOR LOW VOLTAGE OPERATIONS
中文描述： 降壓控制器低電壓運作
文件頁數(shù)： 4/30頁
文件大小： 515K
代理商： L6997S
L6997S
4/30
CURRENT LIMIT AND ZERO CURRENT COMPARATOR
I
LIM
Input bias current
Zero Crossing Comparator offset
Phase-gnd
K
ILIM
Current limit factor
ON TIME
Ton
On time duration
R
ILIM
= 2K
to 200K
4.6
5
5.4
μ
A
mV
-2
2
1.6
1.8
2
μ
A
V
REF
=V
SENSE
OSC=125mV
V
REF
=V
SENSE
OSC=250mV
V
REF
=V
SENSE
OSC=500mV
V
REF
=V
SENSE
OSC=1000mV
720
800
880
ns
370
200
420
230
470
260
ns
ns
90
115
140
ns
OFF TIME
T
OFFMIN
Minimum off time
600
ns
K
OSC
/T
OFFMIN
OSC=250mV
0.20
0.40
VOLTAGE REFERENCE
VREF
Voltage Accuracy
0
μ
A < I
REF
< 100
μ
A
0.594
0.6
0.606
V
PWM COMPARATOR
Input voltage offset
I
FB
Input Bias Current
INTEGRATOR
Over Voltage Clamp
-2
+2
mV
nA
20
V
SENSE
= V
CC
V
SENSE
= GND
0.62
0.75
0.88
V
Under Voltage Clamp
0.45
0.55
0.65
V
Integrator Input Offset Voltage
V
SENSE
-V
REF
Input Bias Current
GATE DRIVERS
High side rise time
High side fall time
Low side rise time
Low side fall time
P
GOOD
UVP/OVP PROTECTIONS
OVP
Over voltage threshold
UVP
Under voltage threshold
Upper threshold
(V
SENSE
-V
REF
)
Lower threshold
(V
SENSE
-V
REF
)
V
PGOOD
-4
-4
mV
I
VSENSE
20
nA
V
DR
=3.3V; C=7nF
HGATE - PHASE from 1 to 3V
50
50
50
50
90
100
90
90
ns
ns
ns
ns
V
DR
=3.3V; C=14nF
LGATE from 1 to 3V
with respect to V
REF
118
67
110
121
70
112
124
73
116
%
%
%
V
SENSE
rising
V
SENSE
falling
85
88
91
%
I
Sink
=2mA
0.2
0.4
V
Table 5. Electrical Characteristics
(continued)
(V
CC
= V
DR
= 3.3V; T
amb
= 0°C to 85°C unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6997STR 功能描述:DC/DC 開關(guān)控制器 3.0 to 5.5V Step-Dwn RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
L6998-0 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT
L6998-1 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT
L6998-5 制造商:Johanson Manufacturing 功能描述:TUNING ELEMENT
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