MAX1806EUA33+ Maxim Integrated Products, MAX1806EUA33+ Datasheet - Page 8

• Manufacturer Part Number: MAX1806EUA33+
• Description: IC REG 3.3V/ADJ 500MA 8-UMAX
• Manufacturer: Maxim Integrated Products

Specifications of MAX1806EUA33+

• Regulator Topology: Positive Fixed or Adjustable
• Voltage - Output: 3.3V, 0.8 ~ 4.5 V
• Voltage - Input: 2.25 ~ 5.5 V
• Number Of Regulators: 1
• Current - Output: 500mA (Min)
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 5.5 V
• Output Voltage: 3.3 V
• Output Type: Adjustable, Fixed
• Dropout Voltage (max): 315 mV
• Output Current: 500 mA
• Line Regulation: 0.125 %/V
• Load Regulation: 15.5 ppm/mA
• Voltage Regulation Accuracy: 1 %
• Maximum Power Dissipation: 1.3 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Reference Voltage: 0.8 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Dropout (typical): -
• Current - Limit (min): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

500mA, Low-Voltage Linear Regulator in µMAX
Figure 1. Functional Diagram
ing a direct heat conduction path from the die to the PC
board. Connect the exposed backside pad and GND to
the system ground using a large pad or ground plane,
or multiple vias to the ground plane layer.
The MAX1806 delivers up to 0.5A(RMS) and operates
with input voltages up to 5.5V, but not simultaneously.
High output currents can only be sustained when input-
output differential is within the limits outlined.
Connect a 1µF capacitor between IN and ground and a
10µF low equivalent series resistance (ESR) capacitor
between OUT and ground. The input capacitor (C
lowers the source impedance of the input supply.
Reduce noise and improve load-transient response,
stability, and power-supply rejection by using larger
8
VOLTAGE (V
_______________________________________________________________________________________
+2.25V TO +5.5V
ON
LOGIC SUPPLY
1µF
C
IN
OFF
V
IN
Capacitor Selection and Regulator
OUT
µC
TO
)
100kΩ
Applications Information
R
POK
SHDN
IN
IN
POK
MAX1806
SHUTDOWN
LOGIC
Stability
AMPLIFIER
ERROR
93% V
IN
DRIVER WITH
REF
)
MOSFET
I
LIM
output capacitors. The output capacitor’s (C
affects stability and output noise. Use output capacitors
with an ESR of 0.1Ω or less to ensure stability and opti-
mum transient response. Surface-mount ceramic
capacitors have very low ESR and are commonly avail-
able in values up to 10µF. Connect C
close to the MAX1806 as possible.
The MAX1806 is designed to operate with low dropout
voltages and low quiescent currents, while still main-
taining good noise, transient response, and AC rejec-
tion. See the Typical Operating Characteristics for a
plot of Power-Supply Rejection Ratio (PSRR) vs. Freq-
uency. When operating from noisy sources, improved
supply-noise rejection and transient response can be
achieved by increasing the values of the input and
output bypass capacitors and through passive-
filtering techniques. The MAX1806 load-transient
0.8V
V
REF
Noise, PSRR, and Transient Response
THERMAL
SENSOR
80mV
GND
OUT
OUT
SET
PRESET MODE
0.8V TO 3.3V
IN
V
OUT
and C
OUT
C
10µF
OUT
OUT
) ESR
as