2
LTC1701/LTC1701B
ORDER PART
NUMBER
S5 PART
MARKING
T
JMAX
= 125°C, θ
JA
= 250°C/W
Consult factory for parts specified with wider operating temperature ranges.
LTKG
LTUD
LTC1701ES5
LTC1701BES5
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Voltages Referred to GND Pin)
V
IN
Voltage (Pin 5).......................................–0.3V to 6V
I
TH
/RUN Voltage (Pin 4) ..............................–0.3V to 3V
V
FB
Voltage (Pin 3) ......................................–0.3V to 3V
V
IN
– 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
(Note 1)
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3.3V, R
ITH/RUN
= 1Meg (from V
IN
to I
TH
/RUN) unless otherwise
specified. (Note 2)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Operating Voltage Range 2.5 5.5 V
I
FB
Feedback Pin Input Current (Note 3) ±0.1 µA
V
FB
Feedback Voltage (Note 3) ● 1.22 1.25 1.28 V
∆V
LINE REG
Reference Voltage Line Regulation V
IN
= 2.5V to 5V (Note 3) 0.04 0.1 %/V
∆V
LOAD REG
Output Voltage Load Regulation Measured in Servo Loop, V
ITH
= 1.5V, (Note 3) 0.01 0.70 %
Measured in Servo Loop, V
ITH
= 1.9V, (Note 3) –0.80 –1.50 %
Input DC Supply Current (Note 4)
Active Mode V
FB
= 0V 185 300 µA
Sleep Mode V
FB
= 1.4V (LTC1701 only) 135 200 µA
Shutdown V
ITH/RUN
= 0V 0.25 1 µA
V
ITH/RUN
Run Threshold High I
TH/RUN
Ramping Down 1.4 1.6 V
Run Threshold Low I
TH/RUN
Ramping Up 0.3 0.6 V
I
ITH/RUN
Run Pullup Current V
ITH/RUN
= 1V 50 100 300 µA
I
SW(PEAK)
Peak Switch Current Threshold V
FB
= 0V 0.9 1.1 A
R
DS(ON)
Switch ON Resistance V
IN
= 5V, V
FB
= 0V 0.28 Ω
V
IN
= 3.3V, V
FB
= 0V 0.30 Ω
V
IN
= 2.5V, V
FB
= 0V 0.35 Ω
I
SW(LKG)
Switch Leakage Current V
IN
= 5V, V
ITH/RUN
= 0V, V
FB
= 0V 0.01 1 µA
t
OFF
Switch Off-Time 400 500 600 ns
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1701E/LTC1701BE 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/LTC1701B are tested in a feedback loop which
servos V
FB
to the midpoint for the error amplifier without R
ITH/RUN
= 1MHz
(V
ITH
= 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: T
J
is calculated from the ambient T
A
and power dissipation P
D
according to the following formula:
LTC1701ES5/LTC1701BES5: T
J
= T
A
+ (P
D
• 250°C/W)
SW 1
GND 2
V
FB
3
5 V
IN
4 I
TH
/RUN
TOP VIEW
S5 PACKAGE
5-LEAD PLASTIC SOT-23
SEE THE APPLICATION
INFORMATION SECTION
