參數(shù)資料
型號(hào): LTC1435C
廠商: Linear Technology Corporation
英文描述: High Efficiency Low Noise Synchronous Step-Down Switching Regulator
中文描述: 高效率低噪聲同步降壓型開(kāi)關(guān)穩(wěn)壓器
文件頁(yè)數(shù): 3/20頁(yè)
文件大?。?/td> 404K
代理商: LTC1435C
3
LTC1435
ELECTRICAL CHARACTERISTICS
The
G
denotes specifications which apply over the full operating
temperature range.
LTC1435CG/LTC1435CS: 0
°
C
T
A
70
°
C
LTC1435IG/LTC1435IS: –40
°
C
T
A
85
°
C
Note 1:
T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formula:
LTC1435CG/LTC1435IG: T
J
= T
A
+ (P
D
)(130
°
C/W)
LTC1435CS/LTC1435IS: T
J
= T
A
+ (P
D
)(110
°
C/W)
Note 2:
The LTC1435 is tested in a feedback loop which servos V
OSENSE
to the balance point for the error amplifier (V
ITH
= 1.19V).
Note 3:
Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 4:
Oscillator frequency is tested by measuring the C
OSC
charge and
discharge currents and applying the formula:
8.4(10
8
)
C
OSC
(pF) + 11
I
CHG
f
OSC
(kHz) =
+
–1
(
)
1
(
)
1
I
DIS
T
A
= 25
°
C, V
IN
= 15V, V
RUN/SS
= 5V unless otherwise noted.
TYPICAL PERFOR
M
A
N
CE CHARACTERISTICS
INPUT VOLTAGE (V)
0
70
E
75
80
85
90
100
5
10
15
20
1435 G01
25
30
95
I
LOAD
= 1A
I
LOAD
= 100mA
V
OUT
= 3.3V
Efficiency vs Input Voltage
V
OUT
= 3.3V
V
IN
– V
OUT
Dropout Voltage
vs Load Current
LOAD CURRENT (A)
0
0
V
I
O
0.2
0.1
0.3
0.4
0.5
0.5
1.0
1.5
2.0
1435 G04
2.5
3.0
R
SENSE
= 0.033
V
OUT
DROP OF 5%
LOAD CURRENT (A)
0.001
50
E
55
65
70
75
100
85
0.01
0.1
1
1435 G03
60
90
95
80
10
CONTINUOUS
MODE
V
IN
= 10V
V
OUT
= 5V
R
SENSE
= 0.033
Burst Mode
OPERATION
Efficiency vs Load Current
V
ITH
Pin Voltage vs Output Current
OUTPUT CURRENT (%)
0
V
I
1.0
2.0
3.0
0.5
1.5
2.5
20
40
60
80
1435 G06
100
10
0
30
50
70
90
Burst Mode
OPERATION
CONTINUOUS
MODE
INPUT VOLTAGE (V)
0
70
E
75
80
85
90
100
5
10
15
20
1435 G02
25
30
95
I
LOAD
= 1A
I
LOAD
= 100mA
V
OUT
= 5V
Efficiency vs Input Voltage
V
OUT
= 5V
Load Regulation
LOAD CURRENT (A)
0
V
O
0
0.5
1.0
1.5
2.0
1435 G05
2.5
3.0
–0.25
–0.50
–0.75
–1.00
–1.25
–1.50
R
SENSE
= 0.033
相關(guān)PDF資料
PDF描述
LTC1435CG High Efficiency Low Noise Synchronous Step-Down Switching Regulator
LTC1435CS High Efficiency Low Noise Synchronous Step-Down Switching Regulator
LTC1435I High Efficiency Low Noise Synchronous Step-Down Switching Regulator
LTC1435IS High Efficiency Low Noise Synchronous Step-Down Switching Regulator
LTC1435IG High Efficiency Low Noise Synchronous Step-Down Switching Regulator
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