Datasheet

2
LTC1574
LTC1574-3.3/LTC1574-5
ORDER PART
NUMBER
LTC1574CS
LTC1574CS-3.3
LTC1574CS-5
Consult factory for Industrial and Military grade parts.
(Note 1)
(Voltage Referred to GND Pin)
Input Supply Voltage (Pin 5) ................. –0.3V to 18.5V
Switch Current (Pin 3, 14) ........................................ 1A
Switch Voltage (Pin 3, 14) .......................... V
IN
– 18.5V
Operating Temperature Range .................... 0°C to 70°C
Junction Temperature (Note 2)............................ 125°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
FB
Feedback Current into Pin 10 LTC1574 1 µA
V
FB
Feedback Voltage LTC1574 ● 1.20 1.25 1.30 V
V
OUT
Regulated Output Voltage LTC1574-3.3 ● 3.14 3.30 3.46 V
LTC1574-5 ● 4.75 5.00 5.25 V
∆V
OUT
Output Voltage Line V
IN
= 6V to 12V, I
LOAD
= 100mA, I
PGM
= V
IN
(Note 3) 10 70 mV
Regulation
Output Voltage Load LTC1574-3.3 (Note 3) 20mA < I
LOAD
< 175mA, I
PGM
= 0V –5 –70 mV
Regulation 20mA < I
LOAD
< 400mA, I
PGM
= V
IN
–45 –70 mV
LTC1574-5 (Note 3) 20mA < I
LOAD
< 175mA, I
PGM
= 0V –5 –70 mV
20mA < I
LOAD
< 400mA, I
PGM
= V
IN
–50 –70 mV
I
Q
Input DC Supply Current (Note 4)
Active Mode 4V < V
IN
< 16V, I
PGM
= 0V 450 600 µA
Sleep Mode 4V < V
IN
< 16V 130 180 µA
Shutdown (Note 5) SHDN = 0V, 4V < V
IN
< 16V 2 25 µA
V
LBTRIP
Low-Battery Trip Point 1.25 1.4 V
I
LBIN
Current into Pin 12 0.5 µA
I
LBOUT
Current Sunk by Pin 11 V
LBOUT
= 0.4V, V
LBIN
= 0V 0.5 1.0 1.5 mA
V
LBOUT
= 5V, V
LBIN
= 10V 1.0 µA
V
HYST
Comparator Hysteresis 7.5 15 30 mV
I
PEAK
Current Limit I
PGM
= V
IN
, V
OUT
= 0V ● 0.54 0.60 0.83 A
I
PGM
= 0V, V
OUT
= 0V ● 0.27 0.34 0.53 A
R
ON
ON Resistance of Switch ● 0.9 1.55 Ω
t
OFF
Switch Off Time V
OUT
at Regulated Value 3 4 5 µs
V
IH
SHDN Pin High Minimum Voltage at Pin 7 for Device to Be Active 1.2 V
V
IL
SHDN Pin Low Maximum Voltage at Pin 7 for Device to Be in Shutdown 0.75 V
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
TOP VIEW
S PACKAGE
16-LEAD PLASTIC SO
*ADJUSTABLE OUTPUT VERSION
T
JMAX
= 125°C, θ
JA
= 110°C/W
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
NC
GND
SW
GND
V
IN
I
PGM
SHDN
NC
NC
GND
SW
GND
LB
IN
LB
OUT
V
OUT
(V
FB
*)
NC
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 9V, SHDN = V
IN
, I
PGM
= 0V, unless otherwise specified.