MAX828 Datasheet PDF


Part Number

MAX828

Description

Switched-Capacitor Voltage Inverters

Manufacture

Maxim

Total Page 8 Pages
PDF Download
Download MAX828 Datasheet PDF


Features Datasheet pdf 19-0495; Rev 2; 4/97 Switched-Capacitor Voltage Inverters _______________Gener al Description The ultra-small MAX828/M AX829 monolithic, CMOS charge-pump inve rters accept input voltages ranging fro m +1.5V to +5.5V. The MAX828 operates a t 12kHz, and the MAX829 operates at 35k Hz. Their high efficiency (greater than 90% over most of the load-current rang e) and low operating current (60µA for the MAX828) make these devices ideal f or both battery-powered and boardlevel voltage-conversion applications. The MA X828/MAX829 combine low quiescent curre nt and high efficiency. Oscillator cont rol circuitry and four power MOSFET swi tches are included on-chip. Application s include generating a -5V supply fro.
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MAX828 Datasheet
19-0495; Rev 3; 9/99
Switched-Capacitor Voltage Inverters
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
o 5-Pin SOT23-5 Package
o 95% Voltage Conversion Efficiency
o Inverts Input Supply Voltage
o 60µA Quiescent Current (MAX828)
o +1.5V to +5.5V Input Voltage Range
o Requires Only Two Capacitors
o 25mA Output Current
Ordering Information
PART
MAX828EUK
MAX829EUK
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
5 SOT23-5
5 SOT23-5
SOT
TOP MARK
AABI
AABJ
Typical Operating Circuit
Pin Configuration
5
C1+
2
IN
3
C1-
4
GND
MAX828
MAX829
OUT 1
INPUT
SUPPLY
VOLTAGE
NEGATIVE
OUTPUT
VOLTAGE
NEGATIVE VOLTAGE CONVERTER
TOP VIEW
OUT 1
5 C1+
MAX828
IN 2 MAX829
C1- 3
4 GND
SOT23-5
________________________________________________________________ Maxim Integrated Products 1
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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