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參數(shù)資料
| 型號： | LT3407-2 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Dual Synchronous,400mA/800mA, 2.25MHz Step-Down DC/DC Regulator |
| 中文描述： | 雙同步，400mA/800mA，2.25MHz降壓直流/直流穩(wěn)壓器 |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 239K |
| 代理商： | LT3407-2 |
LTC3548
3
3548f
2.5
2.4
2.3
2.2
2.1
2.0
F
10
8
6
4
2
0
–2
–4
–6
–8
–10
F
SUPPLY VOLTAGE (V)
2
3548 G06
3
4
5
6
INPUT VOLTAGE (V)
2
3548 G04
3548 G01
3548 G02
3548 G03
3
4
5
6
TEMPERATURE (
°
C)
–50
25
75
3548 G05
–25
0
50
100
125
100
95
90
85
80
75
70
65
60
E
V
IN
= 3.6V
V
OUT
= 1.8V
I
= 180mA
CHANNEL 1; CIRCUIT OF FIGURE 3
V
IN
= 3.6V
V
OUT
= 1.8V
I
= 30mA
CHANNEL 1; CIRCUIT OF FIGURE 3
V
IN
= 3.6V
V
OUT
= 1.8V
I
= 80mA TO 800mA
CHANNEL 1; CIRCUIT OF FIGURE 3
V
= 1.8V, CHANNEL 1
Burst Mode OPERATION
CIRCUIT OF FIGURE 3
800mA
10mA
100mA
1mA
SW
5V/DIV
V
OUT
20mV/DIV
I
L
200mA/DIV
SW
5V/DIV
V
10mV/DIV
I
L
200mA/DIV
V
200mV/DIV
I
L
500mA/DIV
I
500mA/DIV
2
μ
s/DIV
1
μ
s/DIV
20
μ
s/DIV
V
IN
= 3.6V
TYPICAL PERFOR AU
Load Step
Burst Mode Operation
Pulse Skipping Mode
Efficiency vs Input Voltage
Oscillator Frequency vs Supply
Voltage
Oscillator Frequency vs
Temperature
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired. No pin shall exceed 6V.
Note 2:
The LTC3548 is guaranteed to meet specified performance from
0
°
C to 70
°
C. Specifications over the –40
°
C and 85
°
C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3:
The LTC3548 is tested in a proprietary test mode that connects
V
FB
to the output of the error amplifier.
Note 4:
Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5:
T
J
is calculated from the ambient T
A
and power dissipation P
D
according to the following formula: T
J
= T
A
+ (P
D
θ
JA
).
Note 6:
The DFN switch on-resistance is guaranteed by correlation to
wafer level measurements.
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
A
= 25
°
C. V
IN
= 3.6V, unless otherwise specified. (Note 2)
SYMBOL
PARAMETER
POR
Power-On Reset Threshold
Power-On Reset On-Resistance
Power-On Reset Delay
V
RUN
RUN Threshold
I
RUN
RUN Leakage Current
The
●
denotes the specifications which apply over the full operating
CONDITIONS
V
FB
Ramping Down, MODE/SYNC = 0V
MIN
TYP
–8.5
100
262,144
1
0.01
MAX
UNITS
%
200
Cycles
●
0.3
1.5
1
V
●
μ
A
T
A
= 25
°
C unless otherwise specified.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT340Z | 制造商:SEOUL 制造商全稱:Seoul Semiconductor 功能描述:GREEN OVAL LAMP LED |
| LT341 | 制造商:SEOUL 制造商全稱:Seoul Semiconductor 功能描述:BLUE OVAL LAMP LED |
| LT3412G | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Optoelectronic |
| LT341BC | 制造商:Datak Corporation 功能描述: |
| LT341L | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Optoelectronic |
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