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MAX1806 Fiches technique(PDF) 6 Page - Maxim Integrated Products

No de pièce MAX1806
Description  500mA, Low-Voltage Linear Regulator in UMAX
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Fabricant  MAXIM [Maxim Integrated Products]
Site Internet  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX1806 Fiches technique(HTML) 6 Page - Maxim Integrated Products

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500mA, Low-Voltage Linear Regulator in µMAX
6
_______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1, 2
IN
Regulator Input. Supply voltage can range from +2.25V to +5.5V. Bypass with a 1
µF capacitor to GND (see
Capacitor Selection and Regulation Stability). Connect both input pins together externally.
3
POK
Open-Drain, Active-Low Power-OK Output. POK remains low while the output voltage (VOUT) is below the
POK threshold. Connect a 100k
Ω pullup resistor from POK to OUT.
4
SHDN
Active-Low Shutdown Input. A logic low at SHDN reduces supply current to 0.02
µA. In shutdown, the POK
output is low. Connect SHDN to IN for normal operation.
5
GND
Ground. This pin and the exposed pad also function as a heatsink. Solder both to a large pad or to the
circuit-board ground plane to maximize power dissipation.
6
SET
Voltage-Setting Input. Connect SET to GND for preset output. Connect an external resistive voltage-divider
from OUT to SET to set the output voltage between 0.8V and 4.5V. The SET regulation voltage is 800mV.
7, 8
OUT
Regulator Output. OUT sources up to 500mA. Bypass OUT with a 10
µF low-ESR capacitor to GND.
Connect both OUT pins together externally.
LINE-TRANSIENT RESPONSE
MAX1806 toc15
200
µs/div
VIN
1V/div
6V
3V
VOUT
10mV/div
SHUTDOWN WAVEFORM
MAX1806 toc16
20
µs/div
2V
3V
0
0
VOUT
1V/div
ROUT = 6.6
Ω (500mA)
VSHDN
1V/div
Typical Operating Characteristics (continued)
(MAX1806EUA33, VIN = VOUT + 500mV, SHDN = IN, CIN = 1µF, COUT = 10µF, TA = +25°C, unless otherwise noted.)
LOAD-TRANSIENT RESPONSE
NEAR DROPOUT
MAX1806 toc14
10
µs/div
IOUT
200mA/div
VOUT
50mV/div
VIN = VOUT + 100mV
CIN = 10
µF
ROUT = 660
Ω TO
6.6
Ω (5mA TO 500mA)
POK WAVEFORM
MAX1806 toc17
200
µs/div
VIN
2V/div
VOUT
2V/div
5V
0
0
0
VPOK
2V/div
ROUT = 66
Ω (50mA)


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