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MAX6477BL21-AD2-T

Description
LDO Voltage Regulators
Categorysemiconductor    Power management   
File Size396KB,20 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX6477BL21-AD2-T Overview

LDO Voltage Regulators

MAX6477BL21-AD2-T Parametric

Parameter NameAttribute value
Product CategoryLDO Voltage Regulators
ManufacturerMaxim
Mounting StyleSMD/SMT
Package / CaseUCSP-9
Output Voltage1.2 V to 5 V/1.5 V
Output Current300 mA
Number of Outputs1 Output
PolarityPositive
Input Voltage MAX5.5 V
Input Voltage MIN2.5 V
Output TypeAdjustable, Fixed
Minimum Operating Temperature- 40 C
Maximum Operating Temperature+ 85 C
Load Regulation0.2 %
Dropout Voltage0.055 V at 150 mA
Line Regulation0.09 % / V
Pd - Power Dissipation0.84 W
Reference Voltage1.229 V
Voltage Regulation Accuracy1.1 %
19-2532; Rev 6; 2/11
KIT
ATION
EVALU
BLE
AVAILA
300mA LDO Linear Regulators with
Internal Microprocessor Reset Circuit
General Description
Features
o
3

3 UCSP, 6-Pin SOT23, and 8-Pin TDFN
Packages
o
Preset +1.5V to +3.3V Output (100mV Increments)
o
SET Pin for Adjustable Output Voltage
o
75µV
RMS
LDO Output Voltage Noise
(MAX6477–MAX6484)
o
±2.0% Accuracy Over Temperature
o
Guaranteed 300mA Output Current
o
Low Dropout Voltage
55mV at 150mA
114mV at 300mA
o
82µA Supply Current, 0.1µA Shutdown Current
o
Input Reverse Current, Thermal and Short-Circuit
Protection
o
Microprocessor Reset with Four Timeout Options
o
Push-Pull or Open-Drain
RESET
o
Manual Reset Input
o
Remote Feedback Sense
MAX6469–MAX6484
The MAX6469–MAX6484 are low-dropout linear regula-
tors with a fully integrated microprocessor reset circuit.
Each is available with preset output voltages from +1.5V
to +3.3V in 100mV increments and delivers up to 300mA
of load current. These devices consume only 82µA of
supply current. The low supply current, low dropout volt-
age, and integrated reset functionality make these
devices ideal for battery-powered portable equipment.
The MAX6469–MAX6484 include a reset output that indi-
cates when the regulator output drops below standard
microprocessor supply tolerances (-7.5% or -12.5% of
nominal output voltage). This eliminates the need for an
external microprocessor supervisor, while ensuring that
supply voltages and clock oscillators have stabilized
before processor activity is enabled. Push-pull and open-
drain active-low reset outputs are available, with reset
timeout periods of 2.5ms, 20ms, 150ms, or 1200ms (min).
The MAX6469/MAX6470/MAX6473–MAX6478/MAX6481–
MAX6484 also have a shutdown feature that reduces the
supply current to 0.1µA (typ). The MAX6471–MAX6474/
MAX6479–MAX6482 offer a manual reset input to assert a
microprocessor reset while the regulator output is within
specification. The MAX6475/MAX6476/MAX6483/
MAX6484 feature a remote feedback sense pin for use
with an external NPN transistor for higher-current applica-
tions. The MAX6469–MAX6476 are available in 6-pin
SOT23 and 8-pin TDFN packages. The MAX6477–
MAX6484 are available in a 3
×
3 chip-scale package
(UCSP™). All devices are specified for operation from
-40°C to +85°C.
Ordering Information
PART*
MAX6469UT_
_ _D_-T
MAX6469TA_ _ _D_-T**
MAX6470UT_
_ _D_-T
MAX6470TA_ _ _D_-T**
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-
PACKAGE
6 SOT23-6
8 TDFN-EP***
6 SOT23-6
8 TDFN-EP***
Ordering Information continued at end of data sheet.
*Devices
are also available in a lead(Pb)-free/RoHS-compliant
packages. Specify lead(Pb)-free by substituting a +T instead of
a -T when ordering.
**Future
product—contact factory for availability.
***EP
= Exposed pad.
Applications
Handheld Instruments (PDAs, Palmtops)
PCMCIA Cards/USB Devices
Cellular/Cordless Telephones
CD/DVD Drives
Notebook Computers
Digital Cameras
Bluetooth Modules/Wireless LAN
UCSP is a trademark of Maxim Integrated Products, Inc.
Pin Configurations appear at end of data sheet.
Typical Operating Circuits appear at end of data sheet.
Note:
The first “_ _” are placeholders for the output voltage lev-
els of the devices. Desired output voltages are set by the suffix
found in the Output Voltage Suffix Guide (Table 1). The third “_”
is a placeholder for the reset threshold accuracy. Desired reset
threshold accuracy is set by the suffix found in the Reset
Threshold Accuracy Guide (Table 2). The “_” following the D is
a placeholder for the reset timeout delay time. Desired reset
timeout delay time is set by the suffix found in the Reset
Timeout Delay Guide (Table 3). For example, the
MAX6481BL30BD4-T has a 3.0V output voltage, 12.5% reset
threshold tolerance, and a 1200ms (min) reset timeout delay.
Sample stock is generally available on standard versions only
(Table 4). Standard versions require a minimum order incre-
ment of 2.5k units. Nonstandard versions must be ordered in
10k-unit increments. Contact factory for availability.
________________________________________________________________
Maxim Integrated Products
1
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.
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