19-2507; Rev 0; 7/02
Ultra-Low-Power Series Voltage Reference
General Description
Features
The MAX6129 micropower, low-dropout bandgap volt-
age reference combines ultra-low supply current and
low drift in a miniature 5-pin SOT23 surface-mount
package that uses 70% less board space than compa-
rable devices in an SO package. This series-mode volt-
age reference sources up to 4mA and sinks up to 1mA
of load current. A wide 2.5V to 12.6V supply range,
ultra-low 5.25µA (max) supply current, and a low
200mV dropout voltage make these devices ideal for
battery-operated systems.
o Ultra-Low 5.25µA (max) Supply Current
o 4mA Output Source Current
o 1mA Output Sink Current
o ±±.4ꢀ (max) ꢁnitial Accuracy
o 4±ppm/°C (max) Temperature Coefficient
o 2.5V to 12.6V Supply Range
o Low 2±±mV Dropout
An initial accuracy of 0.4% and a 40ppm/°C (max) tem-
perature coefficient make the MAX6129 suitable for
precision applications. Additionally, an internal com-
pensation capacitor eliminates the need for an external
compensation capacitor and ensures stability with load
capacitances up to 10µF.
o Stable with Capacitive Loads Up to 1±µF
o No External Capacitors Required
o Miniature 5-Pin SOT23 Package
The MAX6129 provides six output voltages of 2.048V,
2.5V, 3V, 3.3V, 4.096V, and 5V. The MAX6129 is avail-
able in a 5-pin SOT23 package and is specified over
the extended temperature range (-40°C to +85°C).
Ordering Information
OUTPUT
VOLTAGE
(V)
PIN-
PACKAGE
PART
TEMP RANGE
MAX6129_EUK21-T -40°C to +85°C 5 SOT23-5
MAX6129_EUK25-T -40°C to +85°C 5 SOT23-5
MAX6129_EUK30-T -40°C to +85°C 5 SOT23-5
MAX6129_EUK33-T -40°C to +85°C 5 SOT23-5
MAX6129_EUK41-T -40°C to +85°C 5 SOT23-5
MAX6129_EUK50-T -40°C to +85°C 5 SOT23-5
2.048
2.500
3.000
3.300
4.096
5.000
Applications
Battery-Powered Systems
Hand-Held Instruments
Precision Power Supplies
A/D and D/A Converters
Note: The MAX6129 is available in A or B grades. Choose the
desired grade from the Selector Guide and insert the suffix in
the blank above to complete the part number.
Selector Guide appears at end of data sheet.
Typical Operating Circuit
Pin Configuration
V
= 2.5V TO 12.6V
IN
TOP VIEW
*
IN
GND
N.C.
1
2
3
5
4
OUT
N.C.
IN
MAX6129
MAX6129
GND
OUT
SOT23
*CAPACITOR IS OPTIONAL
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.