參數(shù)資料
型號： LTC3408EDD
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 1.5MHz, 600mA Synchronous Step-Down Regulator with Bypass Transistor
中文描述： 1.3 A SWITCHING REGULATOR, 1800 kHz SWITCHING FREQ-MAX, PDSO8
封裝： 3 X 3 MM, 0.75 MM HEIGHT, PLASTIC, M0-229-WEED-1, DFN-8
文件頁數(shù)： 2/12頁
文件大?。?/td> 156K
代理商： LTC3408EDD
2
LTC3408
3408f
SYMBOL
V
OUT
PARAMETER
Regulated Output Voltage
CONDITIONS
V
REF
= 1.1V
V
REF
= 0.1V
V
IN
= 2.5V to 5V, V
REF
= 0.6V
V
IN
= 3V, V
REF
= 0.9V
MIN
3.23
0.25
TYP
3.3
0.3
0.1
1
0.7
MAX
3.37
0.35
0.4
1.25
UNITS
●
●
V
V
V
OUT
I
PK
V
LOADREG
V
IN
I
S
Output Voltage Line Regulation
Peak Inductor Current
Output Voltage Load Regulation
Input Voltage Range
Input Current
Shutdown Current
Oscillator Frequency
●
%/V
0.70
A
%
V
●
2.5
5
V
RUN
= 1.2V, SW = Open
V
RUN
= 0V, SW = Open
V
REF
≥
0.25V
V
REF
≤
0.1V
V
REF
=
V
REF
=
I
SW
= 160mA, Wafer Level
I
SW
= 160mA, DD Package
I
SW
= –160mA, Wafer Level
I
SW
= –160mA, DD Package
I
OUT
= 100mA, V
IN
= 3V, Wafer Level
I
OUT
= 100mA, V
IN
= 3V, DD Package (Note 4)
V
RUN
= 0V, V
SW
= 0V or 5V, V
IN
= 5V
V
OUT
= 0V, V
IN
= 5V, V
REF
= 0V
1.5
0.1
1.5
700
1.2
1.21
0.3
0.4
0.3
0.4
0.05
0.08
±
0.01
±
0.01
1
±
0.01
±
0.01
2.5
1
1.8
850
mA
μ
A
MHz
kHz
f
OSC
●
1.2
550
1.167
V
REF
Bypass PFET Turn-Off Threshold
Bypass PFET Turn-On Threshold
R
DS(ON)
of P-Channel FET
V
V
μ
A
μ
A
V
μ
A
μ
A
1.26
0.4
R
PFET
R
NFET
R
DS(ON)
of N-Channel FET
0.4
R
BYPASS
R
DS(ON)
of Bypass P-Channel FET
0.08
I
LSW
I
LBYP
V
RUN
I
RUN
I
REF
SW Leakage
Bypass PFET Leakage
RUN Threshold
RUN Input Current
REF Input Current
±
1
±
1
1.5
±
1
±
1
●
0.3
V
RUN
= 0V or 2.5V
●
●
Input Supply Voltage (<300
μ
s) .................. –0.3V to 6V
Input Supply Voltage (DC)....................... –0.3V to 5.5V
RUN, REF, V
OUT
Voltages .......................... –0.3V to V
IN
SW Voltage (DC) ......................... –0.3V to (V
IN
+ 0.3V)
P-Channel Switch Source Current (DC) ............. 800mA
N-Channel Switch Sink Current (DC) ................. 800mA
Peak SW Sink and Source Current ........................ 1.3A
Bypass P-Channel FET Source Current (DC).............. 1A
Operating Temperature Range (Note 2).. –40
°
C to 85
°
C
Junction Temperature (Note 3)............................ 125
°
C
Storage Temperature Range................ –65
°
C to 125
°
C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ABSOLUTEW
(Note 1)
W
W
U
PACKAGE/ORDER U
U
W
LTC3408EDD
ORDER PART
NUMBER
DD PART MARKING
LAEA
T
JMAX
= 125
°
C,
θ
JA
= 43
°
C/W,
θ
JC
= 3
°
C/W
The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25
°
C.
V
IN
= 3.6V unless otherwise specified.
ELECTRICAL CHARACTERISTICS
8
7
6
5
1
2
3
4
V
OUT
V
IN
REF
RUN
V
OUT
V
IN
GND
SW
TOP VIEW
DD PACKAGE
8-LEAD (3mm
×
3mm) PLASTIC DFN
EXPOSED PAD IS GND (PIN 9)
MUST BE SOLDERED TO PCB
9
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The LTC3408E 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.
Note 3:
T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formula:
LTC3408: T
J
= T
A
+ (P
D
)(43
°
C/W)
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