Rainbow Electronics MAX8902B - Manual

General Description
The MAX8902A/MAX8902B low-noise linear regulators
deliver up to 500mA of output current with only
16µV
RMS of output noise in a 100kHz bandwidth. These
regulators maintain their output voltage over a wide
input range, requiring only 100mV of input-to-output
headroom at full load.
These LDOs maintain a low 80µA typical supply cur-
rent, independent of the load current and dropout volt-
age. The regulator control circuitry includes a
programmable soft-start circuit and short circuit,
reverse current, and thermal-overload protection. Other
features include an enable input and a power-OK out-
put (MAX8902B only).
The MAX8902A output voltage can be set to 1.5V, 1.8V,
2.0V, 2.5V, 3.0V, 3.1V, 3.3V, 4.6V, or 4.7V using the
SELA and SELB inputs. The MAX8902B output voltage
can be set between 0.6V and 5.3V with an external
resistor voltage-divider.
Applications
Notebook Computers
MP3 and Portable Media Players
Wireless Headphones
GPS Portable Navigation Devices
Smartphones
Features
♦ 1.7V to 5.5V Input Voltage Range
♦ 0.6V to 5.3V Output Voltage Range
♦ 16µV
RMS
Output Noise, 10Hz to 100kHz
♦ 80µA Operating Supply Current
♦ 92dB PSRR at 5kHz
♦ Guaranteed 500mA Output Current
♦ ±1.5% Output Accuracy Over Load, Line, and
Temperature
♦ 100mV (max) Dropout at 500mA Load
♦ < 1µA Shutdown Supply Current
♦ 700mA Short-Circuit Protection
♦ Thermal-Overload Protection
♦ Output-to-Input Reverse Current Protection
♦ 2mm x 2mm x 0.8mm TDFN Package
MAX8902A/MAX8902B
Low-Noise 500mA LDO Regulators
in a 2mm x 2mm TDFN Package
________________________________________________________________ Maxim Integrated Products 1
19-0990; Rev 2; 2/08
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE
Ordering Information
IN
EN
OUT
BYP
ON
OFF
OUTPUT
4.6V
SELB SELA
OUTS
GND EP
10 μF
INPUT
4.7V TO 5.5V
0.01 μF 10 μF
MAX8902A
Typical Operating Circuits
PART FEATURES
TOP
MARK
PKG
CODE
MAX8902AATA+
Pin-selectable output
voltage
ABG T822-1
MAX8902BATA+
Adjustable output
voltage
ABH T822-1
+ Denotes a lead-free, RoHS-compliant package.
Note: All devices are in an 8-pin, 2mm x 2mm TDFN package
with an exposed paddle and operate over the -40°C to +125°C
automotive temperature range.
IN
EN
OUT
BYP
ON
OFF
OUTPUT ADJUSTABLE
0.6V TO 5.3V
GS
POK
FB
GND EP
10 μF
INPUT
1.7V TO 5.5V
0.01 μF 10 μF
MAX8902B
R1
R2
LOGIC
SUPPLY
R3
100k Ω
TO μC
Pin Configurations appear at end of data sheet.