LTC1514CS8-5#PBF Linear Technology, LTC1514CS8-5#PBF Datasheet - Page 7

• Manufacturer Part Number: LTC1514CS8-5#PBF
• Description: IC MULTI CONFIG 5V 50MA 8SOIC
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Step-Up (Boost), Switched Capacitor (Charge Pump)r

Specifications of LTC1514CS8-5#PBF

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 5V
• Current - Output: 50mA
• Frequency - Switching: 650kHz
• Voltage - Input: 2 ~ 10 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

APPLICATIONS
resistor divider (see Figure 2). Since the low-battery
comparator is kept alive in shutdown, it may be used to
protect batteries against deep discharge by shutting
down the power supply when the battery voltage gets too
TYPICAL APPLICATIONS
5V SUPPLY
ADAPTER
POWER GOOD
MAIN
U
INPUT
WALL
6V
ON OFF
Low Power Battery Backup Supply with Autoswitchover and No Reverse Current
INFORMATION
U
1.5M
1%
499k
1%
TP0610T
1M
1%
499k
1%
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
3V V
806k
1%
499k
1%
4.6V V
U
3.3V Step-Up/Step-Down Supply with Power Good Output
499k
ON OFF
499k
W
TRIP
TRIP
Battery/External Power Autoswitch Regulator
N
100k
1
2
3
4
1
2
3
4
1
2
3
4
MBR0520L
SHDN
LBO
LBI
GND
SHDN
LBO
LBI
GND
LTC1514-3.3
SHDN
LBO
LBI
GND
LTC1514-5
LTC1514-5
U
V
V
V
OUT
C1
C1
OUT
C1
C1
V
V
OUT
C1
C1
V
IN
IN
+
–
IN
+
–
+
–
8
7
6
5
8
7
6
5
8
7
6
5
0.22 F
0.22 F
low. The open-drain comparator output allows for flex-
ible interfacing between the LBO output and external
logic. LBO pull-up resistors in the 50k to 1M range are
recommended.
0.1 F
5V BACKUP SUPPLY
I
+
OUT
+
+
CHARGE PATH
= 15mA
10 F
10 F
10 F
+
+
499k
LTC1514-3.3/LTC1514-5
10 F
10 F
1514 TA03
V
2V TO 8V
IN
1514 TA05
3-CELL
NiCd
BATTERY
+
BAT54
3-CELL
NiCd BATTERY
TRICKLE CHARGE
AND LTC1514 I
22 F
V
I
I
OUT
OUT
OUT
= 15mA, V
= 50mA, V
1514 TA06
= 3.3V 4%
EXTERNAL
POWER GOOD
5V
BACKED-UP
CIRCUITRY
DD
IN
IN
> 2V
> 3V
7