參數(shù)資料
型號(hào)： 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(yè)數(shù)： 2/16頁(yè)
文件大?。?/td> 239K
代理商： LT3407-2
LTC3548
2
3548f
TOP VIEW
DD PACKAGE
10-LEAD (3mm
×
3mm) PLASTIC DFN
DD PIN 11, EXPOSED PAD: PGND
MUST BE CONNECTED TO GND
10
9
8
11
6
7
4
5
3
2
1
V
FB2
RUN2
POR
SW2
MODE/
SYNC
V
FB1
RUN1
V
IN
SW1
GND
V
IN
Voltages.................................................–0.3V to 6V
V
FB1
, V
FB2
, RUN1, RUN2
Voltages ..................................... –0.3V to V
IN
+ 0.3V
MODE/SYNC Voltage ...................... –0.3V to V
IN
+ 0.3V
SW1, SW2 Voltage ......................... –0.3V to V
IN
+ 0.3V
POR Voltage ................................................–0.3V to 6V
ABSOLUTEW
(Note 1)
W
W
U
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
A
= 25
°
C. V
IN
= 3.6V, unless otherwise specified. (Note 2)
SYMBOL
PARAMETER
V
IN
Operating Voltage Range
I
FB
Feedback Pin Input Current
V
FB
Feedback Voltage (Note 3)
The
●
denotes the specifications which apply over the full operating
CONDITIONS
MIN
2.5
TYP
MAX
5.5
30
0.612
0.612
0.5
UNITS
●
V
●
nA
V
V
0
°
C
≤
T
A
≤
85
°
C
–40
°
C
≤
T
A
≤
85
°
C
V
IN
= 2.5V to 5.5V (Note 3)
(Note 3)
0.588
0.585
0.6
0.6
0.3
0.5
●
V
LINE REG
V
LOAD REG
I
S
Reference Voltage Line Regulation
Output Voltage Load Regulation
Input DC Supply Current
Active Mode
Sleep Mode
Shutdown
Oscillator Frequency
Synchronization Frequency
Peak Switch Current Limit Channel 1
Peak Switch Current Limit Channel 2
Top Switch On-Resistance
Bottom Switch On-Resistance
Switch Leakage Current
%/V
%
V
FB1
= V
FB2
= 0.5V
V
FB1
= V
FB2
= 0.63V, MODE/SYNC = 3.6V
RUN = 0V, V
IN
= 5.5V, MODE/SYNC = 0V
V
FB
= 0.6V
700
40
0.1
2.25
2.25
1.2
0.7
0.35
0.30
0.01
950
60
1
2.7
μ
A
μ
A
μ
A
f
OSC
f
SYNC
I
LIM
●
1.8
MHz
MHz
V
IN
= 3V, V
FB
= 0.5V, Duty Cycle <35%
V
IN
= 3V, V
FB
= 0.5V, Duty Cycle <35%
(Note 6)
(Note 6)
V
IN
= 5V, V
RUN
= 0V, V
FB
= 0V
0.95
0.6
1.6
0.9
0.45
0.45
1
A
A
R
DS(ON)
μ
A
I
SW(LKG)
Ambient Operating Temperature
Range (Note 2)................................... –40
°
C to 85
°
C
Junction Temperature (Note 5).............................125
°
C
Storage Temperature Range................. –65
°
C to 125
°
C
Lead Temperature (Soldering, 10 sec)
LTC3548EMSE only..........................................300
°
C
ORDER PART
NUMBER
DD PART MARKING
LBNJ
T
JMAX
= 125
°
C,
θ
= 45
°
C/W,
θ
= 3
°
C/W
(Soldered to a 4-layer board)
LTC3548EDD
PACKAGE/ORDER IU
U
W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ORDER PART
NUMBER
MSE PART MARKING
LTBNH
T
JMAX
= 125
°
C,
θ
= 45
°
C/W,
θ
= 10
°
C/W
(Soldered to a 4-layer board)
LTC3548EMSE
TOP VIEW
1
2
3
4
5
V
RUN1
V
IN
SW1
GND
10
9
8
7
6
V
RUN2
POR
SW2
MODE/
SYNC
11
MSE PACKAGE
10-LEAD PLASTIC MSOP
MSE PIN 11, EXPOSED PAD: PGND
MUST BE CONNECTED TO GND
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