參數(shù)資料
型號(hào)： LT3470
廠商： Linear Integrated Systems
英文描述： Micropower Buck Regulator with Integrated Boost and Catch Diodes
中文描述： 微功耗降壓穩(wěn)壓器與集成升壓二極管和捕捉
文件頁(yè)數(shù)： 3/16頁(yè)
文件大小： 205K
代理商： LT3470
3
LT3470
3470f
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LT3470E is guaranteed to meet performance specifications
from 0
°
C to 70
°
C. Specifications over the –40
°
C to 85
°
C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LT3470I specifications are
guaranteed over the –40
°
C to 125
°
C temperature range.
PARAMETER
Catch Schottky Drop
Catch Schottky Reverse Leakage
Boost Schottky Drop
Boost Schottky Reverse Leakage
Minimum Boost Voltage (Note 4)
BOOST Pin Current
SHDN Pin Current
SHDN Input Voltage High
SHDN Input Voltage Low
CONDITIONS
I
SH
= 100mA
V
SW
= 10V
I
SH
= 30mA
V
SW
= 10V, V
BIAS
= 0V
MIN
TYP
630
0.2
650
0.2
1.7
7
1
MAX
775
2
775
2
2.2
12
5
UNITS
mV
μ
A
mV
μ
A
●
V
I
SW
= 100mA
V
SHDN
= 2.5V
mA
μ
A
2.5
V
V
0.2
The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25
°
C.
V
IN
= 10V, V
SHDN
= 10V, V
BOOST
= 15V, V
BIAS
= 3V unless otherwise specified.
ELECTRICAL CHARACTERISTICS
Note 3:
Bias current flows out of the FB pin.
Note 4:
This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
Note 5:
This parameter is assured by design and correlation with statistical
process controls.
TYPICAL PERFOR U
Efficiency, V
OUT
= 5V
Efficiency, V
OUT
= 3.3V
V
FB
vs Temperature
LOAD CURRENT (mA)
50
E
70
90
40
60
80
0.1
10
100
3470 G01
30
1
L = TOKO D52LC 47
μ
H
T
A
= 25
°
C
V
IN
= 7V
V
IN
= 12V
V
IN
= 36V
V
IN
= 24V
LOAD CURRENT (mA)
50
E
70
90
40
60
80
0.1
10
100
3470 G02
30
1
L = TOKO D52LC 47
μ
H
T
A
= 25
°
C
V
IN
= 12V
V
IN
= 36V
V
IN
= 24V
TEMPERATURE (
°
C)
–50
1.240
V
F
1.245
1.250
1.255
1.260
–25
0
25
50
3470 G03
75
100
125
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