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MAX883CSA Datasheet(PDF) 8 Page - Maxim Integrated Products

Part # MAX883CSA
Description  5V/3.3V or Adjustable, Low-Dropout, Low IQ, 200mA Linear Regulators
Download  17 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX883CSA Datasheet(HTML) 8 Page - Maxim Integrated Products

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5V/3.3V or Adjustable, Low-Dropout,
Low IQ, 200mA Linear Regulators
8
_______________________________________________________________________________________
In adjustable mode, the user selects an output voltage
in the 1.25V to 11V range by connecting two external
resistors, used as a voltage-divider, to the SET pin
(Figure 2).
The output voltage is set by the following equation:
where VSET = 1.20V.
To simplify resistor selection:
Since the input bias current at SET is nominally zero,
large resistance values can be used for R1 and R2 to
minimize power consumption without losing accuracy.
Up to 1.5M
Ω is acceptable for R2. Since the VSET toler-
ance is less than ±40mV, the output can be set using
fixed resistors instead of trim pots.
Standby Mode (MAX882)
The MAX882 has a standby feature that disconnects
the input from the output when STBY is brought low, but
keeps all other circuitry awake. In this mode, VOUT
drops to 0, and the internal biasing circuitry (including
the low-battery comparator) remains on. The maximum
quiescent current during standby is 15µA. STBY is a
comparator input with the other input internally tied to
the reference voltage. Use a resistor network as shown
in Figure 3 to set a standby-mode threshold voltage for
undervoltage lockout. Connect STBY to IN for normal
operation.
OFF Mode (MAX883/MAX884)
A low-logic input on the OFF pin shuts down the
MAX883/MAX884. In this mode, the pass transistor,
control circuit, reference, and all biases are turned off,
and the supply current is reduced to less than 1µA.
LBO is undefined in OFF mode. Connect OFF to IN for
normal operation.
R1
R2
V
V
1
OUT
SET
=−
⎝⎜
⎠⎟
VV
R
R
OUT
SET
=+
⎝⎜
⎠⎟
1
1
2
Figure 1. MAX882/MAX883/MAX884 Functional Diagram
P
OUT
SET
R1
R2
65mV
ERROR AMP
OFF
(STBY)
GND
LBO
LBI
N
IN
MOSFET DRIVER
WITH FOLDBACK
CURRENT LIMIT
REVERSE-
CURRENT
PROTECTION
SHUT-
DOWN
LOGIC
1.20V
REFERENCE
THERMAL
SENSOR
( ) ARE FOR MAX882.
DUAL-MODE
COMPARATOR
LOW-BATTERY
COMPARATOR


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