LT1304-5.0V UTC, LT1304-5.0V Datasheet - Page 3

• Manufacturer Part Number: LT1304-5.0V
• Description: MICROPOWER DC/DC CONVERTERS
• Manufacturer: UTC

UTC LT1304/LT1304-3.3V/LT1304-5.0V
Switch Leakage
The * denotes specifications which apply over the 0
PIN FUNCTIONS
TYPICAL APPLICATION
UTC
2-Cell to 5V Step-Up Converter with Low-Battery Detect
2 CELLS
PIN No.
1
2
3
4
5
6
7
8
PARAMETER
+
100μF
499K
604K
UNISONIC TECHNOLOGIES CO., LTD.
FB/SENSE
NC
SYMBOL
SHDN
GND
LBO
SHUTDOWN
SW
LBI
I
V
6
1
LIM
IN
LBI
I LIM
SHDN
V IN
LT1304-5.0
3
7
22μH
SENSE
LINEAR INTEGRATED CIRCUIT
GND
SW
Low Battery Detector Input. When voltage on this pin is less than
1.17V,detector output is low
Low Battery Detector Output. Open collector can sink up to 500µA.Low
battery detector remains active when device is shut down.
Input Supply. Must be bypassed close (<0.2”) to the pin. See required layout
in the Typical Applications
Collector of Power NPN. Keep copper traces on this pin short and direct to
minimize RFI
Device Ground. Must be low impedance; solder directly to ground plane
Current Limit Set Pin. Float for 1A peak switch current; a resistor to ground
will lower peak current
Shutdown Input. When low, switching regulator is turned off. The
low-battery detector remains active. The SHDN input should not be left
floating. If SHDN is not used, tie the pin to V
On the LT1304 (adjustable) this pin goes to the comparator input. On the
fixed-output versions, the pin connects to the resistor divider which sets output
voltage. The divider is disconnected from the pin during shutdown.
IBO
4
5
Switch off, Vsw=5V
8
2
TEST CONDITIONS
1N5817
100K
°C to 70°C operating temperature range.
D1
+
LOW WHEN
V BAT ＜2.2V
100μF
200mA
LBO
5V
DESCRIPTION
90
80
70
50
40
60
0.01
MIN
IN
LOAD CURRENT(mA)
1
TYP
0.01
Efficiency
10
MAX
7
QW-R103-018,A
V IN =3.3V
V IN =2.5V
V IN =1.8V
100 500
UNIT
µA
3