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ZXLD1601 Fiches technique(PDF) 1 Page - Zetex Semiconductors

No de pièce ZXLD1601
Description  ADJUSTABLE DC - DC BOOST CONVERTER WITH INTERNAL SWITCH IN SC70
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Fabricant  ZETEX [Zetex Semiconductors]
Site Internet  http://www.diodes.com/
Logo ZETEX - Zetex Semiconductors

ZXLD1601 Fiches technique(HTML) 1 Page - Zetex Semiconductors

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SEMICO NDUC TORS
DESCRIPTION
The ZXLD1601 is a PFM inductive boost converter
designed to provide output voltages of up to 28V from
a 2.5V to 5.5V input supply.
The ZXLD1601 includes the output switch and peak
current sense resistor, and can provide up to 10mA
output current at maximum output voltage. Higher
current is available at lower output voltages.
Quiescent current is typically 60 A and a shutdown
function is provided to reduce this current to less than
100nA in the ‘off’ state.
ADVANCED FEATURES
Internal 30V NDMOS switch, current sense and
output setting resistors.
True analogue output voltage control via PWM
with internal filter
FEATURES
Low profile SC70-6 pin package
Internal PWM filter for adjustable output
High efficiency (85% typ)
Wide input voltage range: 2.5V to 5.5V
Up to 250mA output current at 5V
Low quiescent current: (60 A typ)
100nA maximum shutdown current
Up to 1MHz switching frequency
Low external component count
Output voltage is set to a nominal value between 26V
and 28V, by an internal resistor network, but can be
adjusted to lower values by external resistors, an
external PWM control signal applied to the ‘Enable’
pin, or a combination of the two. Depending upon the
control frequency, the PWM signal will provide either
continuous (low ripple) or gated control. The PWM
filter components are contained within the chip.
Minimum output voltage is determined by the input
supply.
The device is assembled in a low profile SC70-6 pin
package.
APPLICATIONS
LCD and OLED bias
Cellular / mobile phones
Digital cameras
PDAs
LCD modules
Varactor and PIN diode bias
Palmtop computers
ZXLD1601
ISSUE 3 - AUGUST 2004
ADJUSTABLE DC - DC BOOST CONVERTER WITH INTERNAL SWITCH
IN SC70
1
PINOUT
TOP VIEW
TYPICAL APPLICATION CIRCUIT


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