MAX8891 Datasheet, PDF (1/8 Pages) Maxim Integrated Products – High PSRR, Low-Dropout, 150mA Linear Regulators

19-4537; Rev 0; 3/09
High PSRR, Low-Dropout, 150mA
Linear Regulators
General Description
The MAX8891/MAX8892 low-dropout (LDO) linear regu-
lators are designed to deliver up to 150mA continuous
output current. These regulators achieve a low 120mV
dropout for 120mA load current.
The MAX8891 only requires an input/output capacitor,
hence achieving the smallest PCB area. The
MAX8892’s output voltage can be adjusted with an
external divider.
The MAX8891 is preset to a variety of voltages in the
1.5V to 4.5V range. Designed with a p-channel
MOSFET series pass transistor, the MAX8891/MAX8892
maintain very low ground current (40µA).
The regulators are designed and optimized to work with
low-value, low-cost ceramic capacitors. The MAX8891/
MAX8892 require only 1µF (typ) of output capacitance
for stability with any load. When disabled, current con-
sumption drops to below 1µA.
These regulators are available in a tiny 5-pin SC70
package.
Applications
Cellular and Cordless Phones
PDA and Palmtop Computers
Base Stations
Bluetooth Portable Radios and Accessories
Wireless LANs
Digital Cameras
Personal Stereos
Portable and Battery-Powered Equipment
Output Voltage Selector Guide appears at end of data sheet.
Pin Configuration
Features
♦ Space-Saving SC70 Package
♦ 65dB PSRR at 10kHz
♦ 120mV Dropout at 120mA Load
♦ Stable with 1µF Ceramic Capacitor for Any Load
♦ Guaranteed 150mA Output
♦ Only Need Input and Output Capacitors (MAX8891)
♦ Output Voltages: 1.5V, 1.8V, 2.5V, 2.6V, 2.7V, 2.8V,
2.85V, 3V, 3.3V, 4.5V (MAX8891) and Adjustable
(MAX8892)
♦ Low 40µA Ground Current
♦ Excellent Load/Line Transient
♦ Overcurrent and Thermal Protection
Ordering Information
PART*
TEMP RANGE PIN-PACKAGE
MAX8891EXKxy+T -40°C to +85°C 5 SC70
MAX8892EXK+T
-40°C to +85°C 5 SC70
*xy is the output voltage code (see Output Voltage Selector
Guide). Other versions between 1.5V and 4.5V are available in
100mV increments. Contact factory for other versions.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Typical Operating Circuits
INPUT
2V TO 6V
C_IN = 1µF
ON
OFF
OUTPUT PRESET
1.5V TO 4.5V
IN
OUT
MAX8891
SHDN
C_OUT = 1µF
GND
TOP VIEW
+
IN ¹
5 OUT
MAX8891/
GND 2 _MAX8892
SHDN 3
4
N.C. (MAX8891)
FB (MAX8892)
SC70
INPUT
2V TO 6V
C_IN = 1µF
ON
OFF
IN
OUT
MAX8892
SHDN
FB
GND
OUTPUT ADJUSTABLE
1.5V TO 4.5V
R1
C_OUT = 1µF
R2
________________________________________________________________ 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.