http://www.www.datasheet4u.com

900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1627 Datasheet

5V/3.3V or Adjustable / 100% Duty-Cycle / High-Efficiency / Step-Down DC-DC Controllers

No Preview Available !

MAX1627 pdf
19-1075; Rev 0; 6/96
EVFAOLLULAOTWIOSNDKAITTAMSAHNEUEATL
5V/3.3V or Adjustable, 100% Duty-Cycle,
High-Efficiency, Step-Down DC-DC Controllers
_______________General Description
The MAX1626/MAX1627 step-down DC-DC switching
controllers provide high efficiency over loads ranging
from 1mA to more than 2A. A unique current-limited,
pulse-frequency-modulated (PFM) control scheme
operates with up to a 100% duty cycle, resulting in very
low dropout voltages. This control scheme eliminates
minimum load requirements and reduces the supply
current under light loads to 90µA (versus 2mA to 10mA
for common pulse-width modulation controllers).
These step-down controllers drive an external P-chan-
nel MOSFET, allowing design flexibility for applications
to 12W or higher. Soft-start reduces current surges dur-
ing start-up. A high switching frequency (up to 300kHz)
and operation in continuous-conduction mode allow the
use of tiny surface-mount inductors. Output capacitor
requirements are also reduced, minimizing PC board
area and system costs.
The output voltage is preset at 5V or 3.3V for the
MAX1626 and adjustable for the MAX1627. Input volt-
ages can be up to 16.5V. The MAX1626/MAX1627 are
functional upgrades for the MAX1649/MAX1651.
____________________________Features
o Low Dropout Voltage
o 100% Maximum Duty Cycle
o Soft-Start Limits Start-Up Current
o Efficiency >90% (3mA to 2A Loads)
o Output Power >12.5W
o 90µA Max Quiescent Current
o 1µA Max Shutdown Current
o Up to 300kHz Switching Frequency
o 16.5V Max Input Voltage
o Output Voltage: 5V/3.3V (MAX1626)
Adjustable (MAX1627)
o Current-Limited Control Scheme
______________Ordering Information
________________________Applications
PCMCIA Power Supplies
Personal Digital Assistants
Hand-Held Computers
Portable Terminals
Low-Cost Notebook Computer Supplies
5V to 3.3V Green PC Applications
High-Efficiency Step-Down Regulation
Minimum-Component DC-DC Converters
Battery-Powered Applications
__________________Pin Configuration
TOP VIEW
OUT 1
3/5 (FB) 2
SHDN 3
REF 4
MAX1626
MAX1627
8 GND
7 EXT
6 CS
5 V+
( ) ARE FOR MAX1627
SO
PART
TEMP. RANGE
MAX1626C/D
0°C to +70°C
MAX1626ESA
-40°C to +85°C
MAX1627C/D
MAX1627ESA
0°C to +70°C
-40°C to +85°C
* Dice are tested at TA = +25°C.
PIN-PACKAGE
Dice*
8 SO
Dice*
8 SO
__________Typical Operating Circuit
INPUT
3.3V to 16.5V
ON/OFF
V+
MAX1626
SHDN
CS
EXT
3/5
REF OUT
GND
P
OUTPUT
3.3V
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1627 Datasheet

5V/3.3V or Adjustable / 100% Duty-Cycle / High-Efficiency / Step-Down DC-DC Controllers

No Preview Available !

MAX1627 pdf
5V/3.3V or Adjustable, 100% Duty-Cycle,
High-Efficiency, Step-Down DC-DC Controllers
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V+ to GND.......................................-0.3V, +17V
OUT, FB, 3/5, SHDN, REF, CS, EXT to GND ...-0.3V, (V+ + 0.3V)
Maximum Current at REF (IREF) ..........................................15mA
Maximum Current at EXT (IEXT) ..........................................50mA
Continuous Power Dissipation (TA = +70°C)
SO (derate 5.88mW/°C above +70°C) ..........................471mW
Operating Temperature Range
MAX1626ESA/MAX1627ESA ............................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+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
(V+ = +3V to +16.5V, SHDN = 3/5 = 0V, TA = 0°C to +85°C, unless otherwise noted.)
PARAMETER
Input Voltage Range
Supply Current into V+
Undervoltage Lockout
Output Voltage
OUT Input Current
FB Threshold Voltage
FB Leakage Current
CS Input Current
CS Threshold Voltage
SHDN Input Voltage High
SHDN Input Voltage Low
SHDN Input Current
3/5 Input Voltage High
3/5 Input Voltage Low
3/5 Leakage Current
EXT Resistance
Minimum EXT Off Time
EXT Duty-Cycle Limit
Line Regulation
Load Regulation
Reference Voltage
REF Load Regulation
REF Line Regulation
SYMBOL
V+
I+
CONDITIONS
Operating, no load
V+ = SHDN = 16.5V (shutdown)
VOUT
IOUT
Circuit of Figure 1, 3/5 = V+ (Note 1)
Circuit of Figure 1, 3/5 = 0V (Note 1)
MAX1626, 3/5 = V+, output forced to 5V
MAX1627, includes hysteresis
MAX1627
VCS
SHDN = 0V or V+
3/5 = 0V or V+
V+ = 5V
Output forced to 0V
Output in regulation
VREF
6.0V < V+ < 12.0V, ILOAD = 1A
30mA < ILOAD < 2.0A, V+ = 8V
ILOAD = 0µA
0µA IREF 100µA
V+ = 3V to 16.5V, ILOAD = 0µA
MIN TYP
3.0
70
4.85
3.20
24
1.27
0
0
85
1.6
2.7
5.00
3.30
37
1.30
100
V+ - 0.5
8
1.5
100
1.27
10
10
2.0
5
15
1.30
4
10
MAX
16.5
90
1
2.8
5.15
3.40
50
1.33
35
10
115
0.4
±1
0.5
±1
12
2.5
1.33
10
100
UNITS
V
µA
V
V
µA
V
nA
µA
mV
V
V
µA
V
V
µA
µs
%
mV/V
mV/A
V
mV
µV/V
2 _______________________________________________________________________________________


Part Number MAX1627
Description 5V/3.3V or Adjustable / 100% Duty-Cycle / High-Efficiency / Step-Down DC-DC Controllers
Maker Maxim
Total Page 16 Pages
PDF Download
MAX1627 pdf
MAX1627 Datasheet PDF
[partsNo] view html
View PDF for Mobile








Similar Datasheet

1 MAX162 Complete High-Speed CMOS 12-Bit ADC Maxim
Maxim
MAX162 pdf
2 MAX1620 Digitally Adjustable LCD Bias Supplies Maxim
Maxim
MAX1620 pdf
3 MAX1621 Digitally Adjustable LCD Bias Supplies Maxim
Maxim
MAX1621 pdf
4 MAX1623 3A / Low-Voltage / Step-Down Regulator with Synchronous Rectification and Internal Switches Maxim
Maxim
MAX1623 pdf
5 MAX1624 High-Speed Step-Down Controllers Maxim
Maxim
MAX1624 pdf
6 MAX1625 High-Speed Step-Down Controllers Maxim Integrated
Maxim Integrated
MAX1625 pdf
7 MAX1626 5V/3.3V or Adjustable / 100% Duty-Cycle / High-Efficiency / Step-Down DC-DC Controllers Maxim
Maxim
MAX1626 pdf
8 MAX1627 5V/3.3V or Adjustable / 100% Duty-Cycle / High-Efficiency / Step-Down DC-DC Controllers Maxim
Maxim
MAX1627 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