LTC1701(1999) Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Fabricante
LTC1701 Datasheet PDF : 12 Pages
| |||
LTC1701
ABSOLUTE AXI U RATI GS
(Note 1)
(Voltages Referred to GND Pin)
VIN Voltage (Pin 5).......................................– 0.3V to 6V
ITH/RUN Voltage (Pin 4) ..............................– 0.3V to 3V
VFB Voltage (Pin 3) ......................................– 0.3V to 3V
Peak Switch Current (Pin 1) ................................... 1.3A
VIN – SW (Max Switch Voltage) ................8.5V to – 0.3V
Operating Temperature Range (Note 2) .. – 40°C to 85°C
Junction Temperature (Note 5) ............................. 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
SW 1
GND 2
VFB 3
5 VIN
4 ITH/RUN
S5 PACKAGE
5-LEAD PLASTIC SOT-23
TJMAX = 125°C, θJA = 110°C/W
ORDER PART
NUMBER
LTC1701ES5
S5 PART
MARKING
LTKG
Consult factory for Industrial and Military grade parts.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.3V, RITH/RUN = 1Meg (from VIN to ITH/RUN) unless otherwise
specified. (Note 2)
SYMBOL
VIN
IFB
VFB
∆VLINE REG
∆VLOAD REG
VITH/RUN
IITH/RUN
ISW(PEAK)
RDS(ON)
PARAMETER
Operating Voltage Range
Feedback Pin Input Current
Feedback Voltage
Reference Voltage Line Regulation
Output Voltage Load Regulation
Input DC Supply Current (Note 4)
Active Mode
Sleep Mode
Shutdown
Run Threshold High
Run Threshold Low
Run Pullup Current
Peak Switch Current Threshold
Switch ON Resistance
ISW(LKG)
tOFF
Switch Leakage Current
Switch Off-Time
CONDITIONS
MIN
2.5
(Note 3)
(Note 3)
q 1.22
VIN = 2.5V to 5V (Note 3)
Measured in Servo Loop, VITH = 1.5V, (Note 3)
Measured in Servo Loop, VITH = 1.9V, (Note 3)
VFB = 0V
VFB = 1.4V
VITH/RUN = 0V
ITH/RUN Ramping Down
ITH/RUN Ramping Up
0.3
VITH/RUN = 1V
50
VFB = 0V
0.9
VIN = 5V, VFB = 0V
VIN = 3.3V, VFB = 0V
VIN = 2.5V, VFB = 0V
VIN = 5V, VITH/RUN = 0V, VFB = 0V
400
TYP
1.25
0.04
0.01
– 0.80
MAX
5.5
± 0.1
1.28
0.1
0.70
– 1.50
UNITS
V
µA
V
%/V
%
%
185 300
µA
135 200
µA
0.25
1
µA
1.4
1.6
V
0.6
V
100 300
µA
1.1
A
0.28
Ω
0.30
Ω
0.35
Ω
0.01
1
µA
500 600
ns
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1701E 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: The LTC1701 is tested in a feedback loop which servos VFB to the
midpoint for the error amplifier (VITH = 1.7V unless otherwise specified).
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5: TJ is calculated from the ambient TA and power dissipation PD
according to the following formula:
LTC1701ES5: TJ = TA + (PD•110°C/W)
2
Share Link: 