MAX6001–MAX6005
Low-Cost, Low-Power, Low-Dropout,
SOT23-3 Voltage References
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Detailed Description
The MAX6001–MAX6005 bandgap references offer a
temperature coefficient of <100ppm/°C and initial accura-
cy of better than 1%. These devices can sink and source
up to 400µA with <200mV of dropout voltage, making
them attractive for use in low-voltage applications.
Applications Information
Output/Load Capacitance
Devices in this family do not require an output capaci-
tance for frequency stability. They are stable for capac-
itive loads from 0 to 2.2nF. However, in applications
where the load or the supply can experience step
changes, an output capacitor will reduce the amount of
overshoot (or undershoot) and assist the circuit’s tran-
sient response. Many applications do not need an
external capacitor, and this family can offer a signifi-
cant advantage in these applications when board
space is critical.
Supply Current
The quiescent supply current of these series-mode ref-
erences is a maximum of 45µA and is virtually indepen-
dent of the supply voltage, with only a 0.8µA/V variation
with supply voltage. Unlike shunt-mode references, the
load current of these series-mode references is drawn
from the supply voltage only when required, so supply
current is not wasted and efficiency is maximized over
the entire supply voltage range. This improved efficien-
cy can help reduce power dissipation and extend bat-
tery life.
When the supply voltage is below the minimum speci-
fied input voltage (as during turn-on), the devices can
draw up to 200µA beyond the nominal supply current.
The input voltage source must be capable of providing
this current to ensure reliable turn-on.
Output Voltage Hysteresis
Output voltage hysteresis is the change in the output
voltage at T
A
= +25°C before and after the device is
cycled over its entire operating temperature range.
Hysteresis is caused by differential package stress
appearing across the bandgap core transistors. The
typical temperature hysteresis value is 130ppm.
Pin Description
NAME FUNCTION
1 IN Supply Voltage Input
2 OUT Reference Voltage Output
PIN
3 GND Ground
Figure 1. Positive and Negative References from Single +3V or +5V Supply
