Datasheet
Detailed Description
The MAX6037 is a family of low-dropout, micropower
voltage references. These devices all feature a shut-
down mode by forcing SHDN low, dropping the quies-
cent current to less than 500nA. The MAX6037 can sink
and source up to 5mA with less than 410mV of dropout
voltage, making them attractive for use in low-voltage
applications. The MAX6037 is available in six fixed out-
put voltages of 1.25V, 2.048V, 2.5V, 3.0V, 3.3V and
4.096V, and an adjustable output version for voltages
between the range of 1.184V and 5V.
Shutdown
The MAX6037 features an active-low shutdown mode.
Pulling SHDN low disables the output and forces the
quiescent current to less than 500nA (typically 50pA).
Connect SHDN to IN for normal operation.
MAX6037_ADJ Adjustable Output Voltage
Set the output voltage on the MAX6037_ADJ by placing
a resistor-divider network between OUT, ADJ, and GND
(See Figure 1). Use the following formula to calculate
the output voltage:
where V
ADJ
= 1.184V. Set R2 = 1MΩ or less. Currents
through Resistor R1 and R2 add to the quiescent supply
current.
Supply Current
The quiescent supply current of the series-mode
MAX6037 family is typically 190µA to 210µA. When the
supply voltage is below the minimum-specified input
voltage during turn-on, the device can draw up to
250µA beyond the nominal supply current. The input
voltage source must be capable of providing this cur-
rent to ensure reliable turn-on.
Thermal Hysteresis
Output voltage hysteresis is the change of output volt-
age at T
A
= +25°C before and after the device is
cycled over its entire operating temperature range. The
typical thermal hysteresis value is 500ppm.
V
R
R
V
OUT ADJ
=+
⎛
⎝
⎜
⎞
⎠
⎟
1
1
2
MAX6037
Low-Power, Fixed and Adjustable Reference
with Shutdown in SOT23
______________________________________________________________________________________ 15
OUT
R2
ADJ
* OPTIONAL
*
IN
2.5V TO 5.5V INPUT
GND
SHDN
R1
REFERENCE
OUTPUT
0.02µF
TO 1µF
MAX6037_ADJ
Figure 1. MAX6037_ADJ Typical Operating Circuit
TEMPERATURE
COEFFICIENT
(ppm/°C)
110
100
16-BIT
14-BIT
12-BIT
10-BIT
8-BIT
0.01
0.1
10
100
1000
1
10,000
18-BIT
20-BIT
OPERATING TEMPERATURE RANGE (T
MAX
- T
MIN
) (°C)
Figure 2. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error