datasheet4u.com

900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1733 Datasheet

Low-Voltage / Step-Down DC-DC Converters in SOT23

No Preview Available !

MAX1733 pdf
19-1586; Rev 0; 7/00
Low-Voltage, Step-Down DC-DC Converters
in SOT23
General Description
The MAX1733/MAX1734 step-down DC-DC converters
deliver over 250mA to outputs as low as 1.25V. These
converters use a unique proprietary current-limited con-
trol scheme that achieves over 90% efficiency. These
devices maintain extremely low quiescent supply cur-
rent (40µA), and their high 1.2MHz (max) operating fre-
quency permits small, low-cost external components.
This combination of features makes the MAX1733/
MAX1734 excellent high-efficiency alternatives to linear
regulators in space-constrained applications.
Internal synchronous rectification greatly improves effi-
ciency and eliminates the external Schottky diode
required in conventional step-down converters. Both
devices also include internal digital soft-start to limit
input current upon startup and reduce input capacitor
requirements.
The MAX1733 provides an adjustable output voltage
(1.25V to 2.0V). The MAX1734 provides factory-preset
output voltages (see Selector Guide). Both are avail-
able in space-saving 5-pin SOT23 packages.
Applications
Cellular, PCS, and Cordless Telephones
PDAs, Palmtops, and Handy-Terminals
Battery-Powered Equipment
Typical Operating Circuit
Features
o 250mA Guaranteed Output Current
o Synchronous Rectifier for Over 90% Efficiency
o Tiny 5-Pin SOT23 Package
o 40µA Quiescent Supply Current
o 0.01µA Logic-Controlled Shutdown
o Up to 1.2MHz Switching Frequency
o Fixed 1.8V or 1.5V Outputs (MAX1734)
o Adjustable Output Voltage (MAX1733)
o ±1.5% Initial Accuracy
o 2.7V to 5.5V Input Range
o Soft-Start Limits Startup Current
Ordering Information
PART
MAX1733EUK-T
MAX1734EUK_ _-T
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
5 SOT23-5
5 SOT23-5
Note: The MAX1734 offers two output voltages. See the Selector
Guide, then insert the proper designator into the blanks above to
complete the part number.
Selector Guide
PART
MAX1733EUK
MAX1734EUK18
MAX1734EUK15
VOUT (V)
Adjustable
1.8
1.5
TOP MARK
ADKY
ADKW
ADKX
Pin Configuration
INPUT
+2.7V TO +5.5V
2.2µF
IN LX
MAX1734
SHDN
OUT
10µH
VOUT AT
250mA
22µF
TOP VIEW
IN 1
5 LX
MAX1733
GND 2 MAX1734
GND
SHDN 3
4 OUT (FB)
( ) ARE FOR MAX1733 ONLY.
SOT23-5
________________________________________________________________ Maxim Integrated Products 1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1733 Datasheet

Low-Voltage / Step-Down DC-DC Converters in SOT23

No Preview Available !

MAX1733 pdf
Low-Voltage, Step-Down DC-DC Converters
in SOT23
ABSOLUTE MAXIMUM RATINGS
IN, SHDN to GND .....................................................-0.3V to +6V
OUT, FB, LX to GND ....................................-0.3V to (VIN + 0.3V)
OUT Short Circuit to GND ..........................................Continuous
Continuous Power Dissipation (TA = +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VIN = +2.7V to +5.5V, SHDN = IN, TA = 0°C to +85°C. Typical values are at TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX
Input Voltage Range
Startup Voltage
UVLO Threshold
UVLO Hysteresis
VIN
VSTART
VUVLO
VIN rising
VIN falling
2.7
1.55
1.85
1.65
200
5.5
2.0
1.95
Quiescent Supply Current
IIN
No switching, no load (FB/OUT above trip
point)
40 70
Shutdown Supply Current
Output Voltage Range (MAX1733)
Output Voltage Accuracy
(MAX1734)
Load Regulation
Line Regulation
OUT Sense Current (MAX1734)
FB Feedback Threshold
(MAX1733)
FB Leakage Current (MAX1733)
SHDN Input High Voltage
SHDN Input Low Voltage
SHDN Leakage Current
High-Side Current Limit
Low-Side Current Limit
High-Side On-Resistance
Rectifier On-Resistance
Rectifier Off-Current Threshold
LX Leakage Current
LX Reverse Leakage Current
Minimum On-Time
Minimum Off-Time
ISHDN
VOUT
VFB
IFB
VIH
VIL
ISHDN
ILIMP
ILIMN
RONP
RONN
ILXOFF
ILXLEAK
ILXLK,R
tON(MIN)
tOFF(MIN)
SHDN = GND
IOUT = 0, TA = +25°C
IOUT = 0 to 250mA
IOUT = 0 to 250mA
VIN = 2.7V to 5.5V
VOUT = VREG, VIN = V SHDN= 5V
TA = +25°C, VIN = 3.6V
VIN = 3.6V
VFB = 1.5V
2.7V < VIN < 5.5V
2.7V < VIN < 5.5V
SHDN = GND or IN
ILX = -50mA, VIN = 3.0V
ILX = -50mA, VIN = 5.5V
ILX = -50mA, VIN = 3.0V
ILX = -50mA, VIN = 5.5V
VIN = 5.5V, VLX = 0 to VIN
IN unconnected, VLX = 5.5V, SHDN = GND
VIN = 3.6V
VIN = 3.6V
1.25
-1.5
-3
1.231
1.220
1.6
300
200
0.28
0.28
0.01
0
0
4
1.250
0.001
0.001
425
325
0.7
0.5
1.0
0.8
40
0.1
0.1
0.4
0.4
4
2.0
+1.5
+3
8
1.269
1.280
0.2
0.4
1
535
430
1.4
1.1
2
1.6
5
5
0.5
0.5
UNITS
V
V
V
mV
µA
µA
V
%
%/mA
%/V
µA
V
µA
V
V
µA
mA
mA
mA
µA
µA
µs
µs
2 _______________________________________________________________________________________


Part Number MAX1733
Description Low-Voltage / Step-Down DC-DC Converters in SOT23
Maker Maxim
Total Page 8 Pages
PDF Download
MAX1733 pdf
MAX1733 Datasheet PDF
[partsNo] view html
View PDF for Mobile








Similar Datasheet

1 MAX173 Complete 5s CMOS 10-Bit A/D Converter Maxim
Maxim
MAX173 pdf
2 MAX1730 50mA Regulated Step-Down Charge Pump Maxim Integrated
Maxim Integrated
MAX1730 pdf
3 MAX1733 Low-Voltage / Step-Down DC-DC Converters in SOT23 Maxim
Maxim
MAX1733 pdf
4 MAX1734 Step-Down DC-DC Converter Maxim Integrated
Maxim Integrated
MAX1734 pdf
5 MAX1735 200mA / Negative-Output / Low-Dropout Linear Regulator Maxim
Maxim
MAX1735 pdf
6 MAX1736 SOT23 / Single-Cell Li+ Battery Charger for Current-Limited Supply Maxim
Maxim
MAX1736 pdf
7 MAX1737 Stand-Alone Switch-Mode Lithium-Ion Battery-Charger Controller Maxim
Maxim
MAX1737 pdf
8 MAX1739 Wide Brightness Range CCFL Backlight Controllers Maxim
Maxim
MAX1739 pdf





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy