MAX866 Maxim, MAX866 Datasheet
MAX866
Manufacturer Part Number
MAX866
Description
3.3V/5V or Adjustable-Output / Single-Cell DC-DC Converters
Manufacturer
Maxim
Datasheet
1.MAX866.pdf
(12 pages)
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The MAX866 and MAX867 are ultra-small, high-efficiency,
CMOS, step-up, DC-DC switching regulators for 1-cell
battery-powered systems. The MAX866 accepts a posi-
tive input voltage between 0.8V and V
to a higher, pin-selectable output voltage of 3.3V or 5V.
The MAX867 adjustable version accepts 0.8V to 6.0V
input voltages and generates a higher adjustable output
voltage in the 2.7V to 6.0V range. Typical efficiencies are
greater than 80%. Typical no-load supply current is
100µA (1µA in shutdown).
The MAX866/MAX867 combine ultra-low quiescent sup-
ply current and high efficiency to give maximum battery
life. Its high switching frequency permits the use of
small, low-cost inductors and capacitors. Additionally,
internal peak-current limiting protects the IC.
________________________Applications
19-0374; Rev 1; 5/96
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
__________Typical Operating Circuit
_______________General Description
LOW-BATTERY
3V/5V SELECT
0.22 F
DETECTOR
0.8V TO V
Pagers
Remote Controls
Detectors
1-Cell Battery-Operated Equipment
Backup Supplies
ON/OFF
INPUT
INPUT
OUT
________________________________________________________________ Maxim Integrated Products
SHDN
3/5
LBI
REF
MAX866
GND
OUT
LBO
LX
MBRS0520LTI
OR 1N5817
OUT
330 H
and converts it
LOW-BATTERY
DETECTOR OUTPUT
3.3V/5V or Adjustable-Output,
Single-Cell DC-DC Converters
5V OR 3.3V
OUTPUT
47 F
____________________________Features
* Dice are tested at T
_________________Pin Configurations
______________Ordering Information
MAX866C/D
MAX866ESA
MAX866EUA
MAX867C/D
MAX867ESA
MAX867EUA
0.8V to 6.0V Input Supply Voltage
0.9V Guaranteed Start-Up Supply Voltage
>80% Efficiency Over Wide Load Range
100µA No-Load Battery Current (V
1µA Shutdown Mode
Up to 250kHz Switching Frequency
±1.5% Reference Tolerance
Low-Battery Detector (LBI/LBO)
Available in Ultra-Small 8-Pin µMAX Package
(1.11mm high)
Circuit Fits in 0.2in
PART
TOP VIEW
SHDN
SHDN
LBO
REF
LBO
REF
3/5
FB
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
A
0°C to +70°C
0°C to +70°C
= +25°C only.
1
2
3
4
1
2
3
4
2
SO/µMAX
SO/µMAX
MAX866
MAX867
8
7
6
5
PIN-PACKAGE
8
7
6
5
Dice*
8 SO
8 µMAX
Dice*
8 SO
8 µMAX
OUT
LX
GND
OUT
LBI
LX
GND
OUT
LBI
= 3.3V)
1
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