MAX8569A Datasheet, PDF (1/11 Pages) Maxim Integrated Products – 200mA Step-Up Converters in 6-Pin SOT23 and TDFN

19-3671; Rev 0; 5/05
EVAALVUAAILTAIOBNLEKIT
200mA Step-Up Converters in 6-Pin
SOT23 and TDFN
General Description
The MAX8569A/MAX8569B low-quiescent-current
boost regulators provide up to 200mA at output volt-
ages up to 5.5V from a 1.5V to 5.5V input source. The
built-in synchronous rectifier allows for over 90% effi-
ciency while achieving small size and low cost by elimi-
nating the need for an external Schottky diode.
The MAX8569A provides an adjustable output while the
MAX8569B is fixed at 3.0V or 3.3V. The MAX8569B fea-
tures a power-on reset output (RST) to signal that the
output has reached regulation. All devices connect the
battery input to the output during shutdown, allowing
the input battery to be used as a backup or real-time
clock supply when the converter is off.
Applications
Medical Diagnostic
Equipment
Digital Cameras
PDAs and Smartphones
Cordless Phones
Battery Backup
PC Cards
Local 3.3V or 5V Supply
Typical Operating Circuit
2V
INPUT
BATT
OUT
ON
OFF
LX ^MAX8569B
RST
SHDN
GND
3.3V, 200mA
OUTPUT
POWER-ON
RESET
Selector Guide appears at end of data sheet.
Features
o Over 200mA Available Output Current
o 1.5V to 5.5V Input Voltage Range
o BATT Connected to OUT in Shutdown for Backup
Power
o Up to 95% Efficiency
o 7µA Typical Quiescent Current
o <1µA Shutdown Supply Current
o Internal Synchronous Rectifier
o 750mA Switch Current Limit
o RST Output (MAX8569B)
o Adjustable Output Voltage (MAX8569A)
o Fixed 3.0V or 3.3V Output Voltage (MAX8569B)
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX8569AEUT-T*
-40°C to +85°C
6 SOT23-6
(U6FH-6)
MAX8569AETT+
-40°C to +85°C
6 TDFN 3mm x 3mm
(T633-1)
MAX8569BEUT-T* -40°C to +85°C ^{6 SOT23-6}
(U6FH-6)
MAX8569BETT+
-40°C to +85°C ^{6 TDFN 3mm x 3mm}
(T633-1)
MAX8569BETT30+ -40°C to +85°C ^{6 TDFN 3mm x 3mm}
(T633-1)
*Future product—contact factory for availability.
+Denotes lead-free packaging.
Pin Configurations
TOP VIEW
6
5
4
MAX8569A
(MAX8569B)
+
1
2
3
TOP VIEW
SHDN 1
6 FB (RST)
MAX8569A
BATT 2 _(MAX8569B) 5 OUT
GND 3
4 LX
SOT23
( ) ARE FOR THE MAX8569B
TDFN
+ DENOTES LEAD-FREE PACKAGING
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.