Rainbow-electronics MAX829 Uživatelský manuál

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General Description
The ultra-small MAX828/MAX829 monolithic, CMOS
charge-pump inverters accept input voltages ranging
from +1.5V to +5.5V. The MAX828 operates at 12kHz,
and the MAX829 operates at 35kHz. Their high efficiency
(greater than 90% over most of the load-current range)
and low operating current (60µA for the MAX828) make
these devices ideal for both battery-powered and board-
level voltage-conversion applications.
The MAX828/MAX829 combine low quiescent current
and high efficiency. Oscillator control circuitry and four
power MOSFET switches are included on-chip.
Applications include generating a -5V supply from a +5V
logic supply to power analog circuitry. Both parts come
in a 5-pin SOT23-5 package and can deliver 25mA with
a voltage drop of 500mV.
For a similar device with logic-controlled shutdown,
refer to the MAX1719/MAX1720/MAX1721. For applica-
tions requiring more power, the MAX860 delivers up to
50mA with a voltage drop of 600mV, in a space-saving
µMAX package.
Applications
Small LCD Panels
Cell Phones
Medical Instruments
Handy-Terminals, PDAs
Battery-Operated Equipment
Features
5-Pin SOT23-5 Package
95% Voltage Conversion Efficiency
Inverts Input Supply Voltage
60µA Quiescent Current (MAX828)
+1.5V to +5.5V Input Voltage Range
Requires Only Two Capacitors
25mA Output Current
MAX828/MAX829
Switched-Capacitor Voltage Inverters
________________________________________________________________ Maxim Integrated Products 1
TOP VIEW
IN
GND
C1-
C1+
OUT
SOT23-5
1
5
MAX828
MAX829
2
3
4
Pin Configuration
NEGATIVE VOLTAGE CONVERTER
C1+
C1-
IN
OUT
GND
INPUT
SUPPLY
VOLTAGE
NEGATIVE
OUTPUT
VOLTAGE
MAX828
MAX829
4
3
52
1
Typical Operating Circuit
19-0495; Rev 3; 9/99
PART
MAX828EUK
-40°C to +85°C
TEMP. RANGE
PIN-
PACKAGE
5 SOT23-5
Ordering Information
MAX829EUK
-40°C to +85°C 5 SOT23-5
SOT
TOP MARK
AABI
AABJ
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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Shrnutí obsahu

Strany 1 - MAX828/MAX829

General DescriptionThe ultra-small MAX828/MAX829 monolithic, CMOScharge-pump inverters accept input voltages rangingfrom +1.5V to +5.5V. The MAX828 op

Strany 2

MAX828/MAX829Switched-Capacitor Voltage Inverters2 _______________________________________________________________________________________ABSOLUTE MAX

Strany 3

MAX828/MAX829Switched-Capacitor Voltage Inverters_______________________________________________________________________________________ 34001.5 2.5OU

Strany 4

_____________________Pin DescriptionMAX828/MAX829Switched-Capacitor Voltage Inverters4 _______________________________________________________________

Strany 5

_______________Detailed DescriptionThe MAX828/MAX829 capacitive charge pumps invert thevoltage applied to their input. For highest performance,use low

Strany 6

MAX828/MAX829Switched-Capacitor Voltage Inverters6 _______________________________________________________________________________________Flying Capac

Strany 7

MAX828/MAX829Switched-Capacitor Voltage Inverters_______________________________________________________________________________________ 7Heavy Output

Strany 8

MAX828/MAX829Switched-Capacitor Voltage InvertersMAX828MAX8292C1-INOUTC1+GND1C2CIN0.1µFC1354OUTPUTINPUTOFFONSHUTDOWNLOGICSIGNALFigure 8. Shutdown Con

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