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LTC3405A-1.375 数据表(PDF) 2 Page - Linear Technology

部件名 LTC3405A-1.375
功能描述  1.375V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LTC3405A-1.375 数据表(HTML) 2 Page - Linear Technology

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LTC3405A-1.375
3405a1375f
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IPK
Peak Inductor Current
VIN = 3V, VOUT = 1.238V, Duty Cycle < 35%
375
500
625
mA
VOUT
Regulated Output Voltage
MODE = 3.6V
1.334
1.375
1.416
V
∆VOVL
∆Output Overvoltage Lockout
∆VOVL = VOVL – VOUT
2
5.6
9.3
%
∆VOUT
Output Voltage Line Regulation
VIN = 2.5V to 5.5V
0.04
0.4
%/V
VLOADREG
Output Voltage Load Regulation
0.5
%
VIN
Input Voltage Range
2.5
5.5
V
IS
Input DC Bias Current
(Note 4)
Pulse Skipping Mode
VOUT = 1.238V, MODE = 3.6V, ILOAD = 0A
300
400
µA
Burst Mode
® Operation
VOUT = 1.42V, MODE = 0V, ILOAD = 0A
20
35
µA
Shutdown
VRUN = 0V, VIN = 4.2V
0.1
1
µA
fOSC
Oscillator Frequency
VOUT = 1.375V
1.2
1.5
1.8
MHz
VOUT = 0V
170
kHz
RPFET
RDS(ON) of P-Channel FET
ISW = 100mA
0.7
0.85
RNFET
RDS(ON) of N-Channel FET
ISW = –100mA
0.6
0.90
ILSW
SW Leakage
VRUN = 0V, VSW = 0V or 5V, VIN = 5V
±0.01
±1
µA
VRUN
RUN Threshold
0.3
1
1.5
V
IRUN
RUN Leakage Current
±0.01
±1
µA
VMODE
MODE Threshold
0.3
1.5
2
V
IMODE
MODE Leakage Current
±0.01
±1
µA
LTC3405AES6-1.375
TJMAX = 125°C, θJA = 250°C/ W
ORDER PART
NUMBER
(Note 1)
Input Supply Voltage .................................. – 0.3V to 6V
MODE, RUN, VOUT Voltages....................... – 0.3V to VIN
SW Voltage .................................. – 0.3V to (VIN + 0.3V)
P-Channel Switch Source Current (DC) ............. 400mA
N-Channel Switch Sink Current (DC) ................. 400mA
Peak SW Sink and Source Current .................... 630mA
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Junction Temperature (Note 3) ............................ 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
S6 PART MARKING
Consult LTC Marketing for parts specified with wider operating temperature ranges.
The
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
VIN = 3.6V unless otherwise specified.
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
ELECTRICAL CHARACTERISTICS
RUN 1
GND 2
SW 3
6 MODE
5 VOUT
4 VIN
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
Burst Mode is a registered trademark of Linear Technology Corporation.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3405A-1.375 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: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formula:
LTC3405A-1.375: TJ = TA + (PD)(250°C/W)
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
LTBRP


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