LT1304 Datasheet, PDF (1/19 Pages) Linear Technology – Micropower DC/DC Converters with Low-Battery Detector Active in Shutdown

UTC LT1304/LT1304-3.3V/LT1304-5.0V
LINEAR INTEGRATED CIRCUIT
MICROPOWER DC/DC
CONVERTERS WITH
LOW-BATTERY DETECTOR
ACTIVE IN SHUTDOWN
DESCRIPTION
The UTC LT1304 is a micropower step-up DC/DC
converter ideal for use in small, low voltage,
battery-operated systems. The devices operate from a
wide input supply range of 1.5V to 8V.
The UTC LT1304-3.3 and LT1304-5.0 generate
regulated outputs of 3.3V and 5V and the adjustable
LT1304 can deliver output voltages up to
25V.Quiescent current,120 μ A in active mode,
decreases to just 10 μ A in shutdown with the
low-battery detector still active. Peak switch current,
internally set at 1A,can be reduced by adding a single
resistor from the ILIM pin to ground. The high speed
operation of the UTC LT1304 allows the use of small,
surface-mountable inductors and capacitors.
FEATURES
*5V at 200mA from two cells.
*10μA quiescent current in shutdown.
*Operates with VIN as low as1.5V
*Low battery detector active in shutdown
*Low switch VCESAT:370mV at 1A typical.
*120μA quiescent current in active mode.
*Switching frequency up to 300kHz
*Programmable peak current with one resistor.
.
SOP-8
DIP-8
APPLICATIONS
*2-,3-,or 4-cell to 5V or 3.3V step-up
*Portable instruments
*Bar code scanners
*Palmtop computers
*Diagnostic medical instrumentation.
*Personal data communicators/computers.
PIN CONFIGURATION
LBI 1
LBO 2
VIN 3
SW 4
8 FB(SENSE)*
7 SHDN
6 IL I M
5 GND
UTC UNISONIC TECHNOLOGIES CO., LTD. 1
QW-R103-018,A