ZXSC100 Datasheet, PDF (1/17 Pages) Zetex Semiconductors – SINGLE CELL DC-DC CONVERTER SOLUTION

SINGLE CELL DC-DC CONVERTER SOLUTION
ZXSC100
DESCRIPTION
The ZXSC100 series is designed for DC-DC
applications where step-up voltage conversion from
very low input voltages is required. These applications
mainly operate from single nickel cadmium or nickel
metal hydride battery cells.
The IC and discrete combination offers the ultimate
cost vs performance solution for single cell DC-DC
conversion.
The circuit can start up under full load with regulation
maintained down to an input voltage of only 0.926
volts. The solution configuration ensures optimum
efficiency over a wider range of load currents, several
circuit configurations are possible with power
dissipation up to 2W. The step up output voltage is
easily programmed with external resistors, the
non-synchronous architecture and SuperSOT4™
device enabling an output voltage down to the input
voltage level. For best performance the ZXSC100
quiescent current is a small 150µA ensuring minimum
battery drain in no load conditions.
FEATURES
APPLICATIONS(continued)
• Efficiency maintained over a wide range of input
voltages and load currents
82% efficiency @ V_BATT=1V
• Startup under full load
• Hand held instruments
• Portable medical equipment
• Solar powered equipment
• Minimum operating input voltage V_BATT=0.926V
• Adjustable output voltage down to V_BATT
• Quiescent current typically 150µA referred to
input voltage
• MSOP8 package
• SO8 package
TYPICAL APPLICATION CIRCUIT
VBATT
L1
R1
D1
ZHCS1000
APPLICATIONS
• Cordless telephones
• MP3 players
• PDA
• Pagers
• Battery backup supplies
• Electronic toothbrush
• GPS receivers
• Digital camera
• Palmtop computers
U1
EM
VDRIVE
BAS ISENSE
RE
FB
VCC
GND
ZXSC100
C1
ORDERING INFORMATION
Q1
FMMT617
R2
3.3V/0.1A
R3
C3
C2
R4
DEVICE
Package Partmarking
ZXSC100X8 MSOP8
ZXSC100N8 SO8
ZXSC100
ZXSC100
Reel
size
7”
7”
Tape
width
12mm
12mm
Quantity per
reel
1,000
500
ISSUE 3 - JANUARY 2004
1
SEMICONDUCTORS