lt3011emse Linear Technology Corporation, lt3011emse Datasheet - Page 14

• Manufacturer Part Number: lt3011emse
• Description: 50ma, 3v To 80v Low Dropout Micropower Linear Regulator With Pwrgd
• Manufacturer: Linear Technology Corporation

LT3011
TYPICAL APPLICATIONS
14
LOW
OPERATING
CURRENT
TO 60V
5.5V*
HIGH
V
IN
(72V TRANSIENT)
(FUTURE 42V)
100k
C3
4.7 F
100V
CERAMIC
OFF
OFF
12V
V
IN
ON
ON
48V
V
+
IN
15
14
10
4
8
5
V
SHDN
SYNC
IN
SHDN
PWRGD
GND
IN
GND
1, 8, 9, 16
BOOST
LT1766
LT3011
3, 11
1 F
1 F
6
C
5V Buck Converter with Low Current Keep Alive Backup
T
BIAS
6
V
OUT
ADJ
SW
C
FB
1000pF
11
NO PROTECTION
DIODE NEEDED!
IN
SHDN
C
1nF
2
10
12
C
1
2
LT3011
750k
249k
GND
R1
15.4k
R2
4.99k
LT3011 Automotive Application
D1
10MQ060N
C2
0.33 F
LT3011 Telecom Application
*
†
OUT
ADJ
FOR INPUT VOLTAGES BELOW 7.5V,
SOME RESTRICTIONS MAY APPLY
INCREASE L1 TO 30 H FOR LOAD
CURRENTS ABOVE 0.6A AND TO
60 H ABOVE 1A.
LT3011 PIN NUMBERS ARE FOR
THE DD PACKAGE.
TANTALUM
100 F 10V
IN
SHDN
15 H
SOLID
D1N914
L1
LT3011
D2
†
C1
750k
249k
GND
+
NO PROTECTION
DIODE NEEDED!
OUT
ADJ
3011 TA03
V
5V
1A/250mA
OUT
750k
249k
1 F
1 F
100
SYSTEM MONITOR
90
70
60
50
80
SECURITY SYSTEM
LOAD: CLOCK,
0
V
L = 68 H
LOAD:
OUT
Effi ciency vs Load Current
ETC
ETC
= 5V
0.25
3011 TA05
Buck Converter
LOAD CURRENT (A)
0.50
V
V
+
–
IN
IN
BACKUP
BATTERY
0.75
= 10V
= 42V
1.00
3011 TA04
1.25
3011f