SP6645EU Sipex Corporation, SP6645EU Datasheet
SP6645EU
Manufacturer Part Number
SP6645EU
Description
Manufacturer
Sipex Corporation
Specifications of SP6645EU
Case
MSOP-8
Date_code
03
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SP6645EU
Manufacturer:
SIPEX
Quantity:
20 000
Company:
Part Number:
SP6645EU-TR
Manufacturer:
EPCOS
Quantity:
4 000
Rev. 2/27/01
DESCRIPTION
The SP6644/6645 devices are high-efficiency, low-power step-up DC-DC converters ideal
for single or dual alkaline cell applications such as pagers, remote controls, pointing devices,
medical monitors, and other low-power portable end products. Designers can control the
SP6644 device with a 1nA active LOW shutdown input. The SP6644 device features an
active low output for batteries below +1.0V. The SP6645 device features an active low output
for batteries below +2.0V. Both devices contain a 0.8
N-channel MOSFET power switch, an internal voltage reference, circuitry for pulse-
frequency-modulation, and an under voltage comparator. The output voltage for the
SP6644/6645 devices is preset to +3.3V + 4% or can be adjusted from +2V to +5.5V by
manipulating two external resistors.
SP6644/45 +3.3V Typical Application Circuit
90mA Output Current at 1.3V Input
190mA Output Current at 2.6V Input
+2V to +5.5V Output Range
0.88V Guaranteed Start-Up
92% High Efficiency
1.6 A Quiescent Supply Current at V
Reverse Battery Protection
Internal Synchronous Rectifier
5nA Logic Controlled Shutdown Current
Low-Battery Detection Active LOW Output
Extremely Small SOIC Package
Flexibility to Optimize Inductor Type with
No External FETs
From V
Programmable Peak Current Control
3.3V Input
BATT
0.88V to
Single/Dual Alkaline Cell, High Efficiency
®
47 F
SP6644/6645 +3.3V Typical Application Circuit
SHDN
R
LIM
BATT
V
SP6644
SP6645
BATT
GND
22 H
0.7A
1
FB
LX
Boost DC-DC Regulator
V
OUT
BATTLO
synchronous rectifier, a 0.5
SP6644/6645
47 F
© Copyright 2001 Sipex Corporation
+3.3V
OUT
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