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PDF MAX1606 Data sheet ( Hoja de datos )
| Número de pieza | MAX1606 | |
| Descripción | 28V Internal Switch LCD Bias Supply with True Shutdown | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX1606 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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19-1744; Rev 0; 7/00
28V Internal Switch LCD Bias Supply
with True Shutdown
General Description
The MAX1606 is a step-up DC-DC converter that con-
tains a 0.5A internal power switch and a 0.5A output
isolation switch in an 8-pin µMAX package. The IC
operates from a 2.4V to 5.5V supply voltage but can
boost battery voltages as low as 0.8V up to 28V.
The MAX1606 uses a unique control scheme that pro-
vides high efficiency over a wide range of load condi-
tions. An internal 0.5A MOSFET reduces external
component count, and a high switching frequency (up
to 500kHz) allows for tiny surface-mount components.
The current limit can be set to 500mA, 250mA, or
125mA, allowing the user to reduce the output ripple
and component size in low-current applications.
Additional features include a low quiescent supply cur-
rent and a true shutdown mode that saves power by
disconnecting the output from the input. The MAX1606
is ideal for small LCD panels with low current require-
ments but can also be used in other applications. A
MAX1606 evaluation kit is available to help speed up
design time.
________________________Applications
LCD Bias Generators
Cellular or Cordless Phones
Palmtop Computers
Personal Digital Assistants (PDAs)
Organizers
Handy Terminals
Features
o Adjustable Output Voltage up to 28V
o 20mA at 20V from a Single Li+ Battery
o True Shutdown (Output Disconnected from Input)
o Output Short-Circuit Protection
o 88% Efficiency
o Up to 500kHz Switching Frequency
o Selectable Inductor Current Limit
(125mA, 250mA, or 500mA)
o 0.1µA Shutdown Current
o 8-Pin µMAX Package
PART
MAX1606EUA
Ordering Information
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
8 µMAX
Typical Operating Circuit
Pin Configuration
VIN = 0.8V TO 5.5V
VCC = 2.4V TO 5.5V
ON
OFF
SW
BATT LX
MAX1606
VCC FB
LIM
SHDN
GND
VOUT = VIN TO 28V
TOP VIEW
BATT 1
FB 2
VCC 3
GND 4
MAX1606
µMAX
8 SW
7 SHDN
6 LIM
5 LX
________________________________________________________________ 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.
1 page  
28V Internal Switch LCD Bias Supply
with True Shutdown
Typical Operating Characteristics (continued)
(VCC = 3.3V, VBATT = 3.6V, L1 = 10µH, SHDN = LIM = VCC, VOUT(NOM) = 18V (Figure 3), TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. SUPPLY VOLTAGE
100
IOUT = 5mA
90
80
70
IOUT = 1mA
60
50 L1 = 10µH, LIM = VCC
L1 = 100µH, LIM = OPEN
40
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VCC (V)
EFFICIENCY vs. BATTERY VOLTAGE
100
IOUT = 5mA
90
80
70
60 IOUT = 1mA
50
40
30
L1 = 10µH, LIM = VCC
L1 = 100µH, LIM = OPEN
20
0123456
VBATT (V)
EFFICIENCY vs. LOAD CURRENT
(L1 = 10µH)
100
90
LIM = VCC
80
70
60 LIM = OPEN
LIM = GND
50
40
0
5 10 15 20
LOAD CURRENT (mA)
25
EFFICIENCY vs. LOAD CURRENT
(L1 = 47µH)
100
90 LIM = OPEN
LIM = VCC
80
70 LIM = GND
60
50
EFFICIENCY vs. LOAD CURRENT
(L1 = 100µH)
100
LIM = OPEN
90
80
70
LIM = GND
LIM = VCC
60
50
PEAK INDUCTOR CURRENT LIMIT
vs. SUPPLY VOLTAGE
600
VBATT = 3.6V
500
LIM = VCC
400
300 LIM = OPEN
200 LIM = GND
100
40
0
5 10 15 20 25
LOAD CURRENT (mA)
30
PEAK INDUCTOR CURRENT LIMIT
vs. BATTERY VOLTAGE
600
VCC = 3.3V
500
LIM = VCC
400
300 LIM = OPEN
200
LIM = GND
100
0
0.5 1.5 2.5 3.5 4.5 5.5
VBATT (V)
40
0
180
160
140
120
100
80
60
40
20
0
0
5 10 15 20 25
LOAD CURRENT (mA)
30
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
1 2 34 5
VCC (V)
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VCC (V)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
SUPPLY CURRENT
vs. LOAD CURRENT
LIM = GND
(125mA)
LIM = OPEN
(250mA)
LIM = VCC
(500mA)
5 10 15 20
LOAD CURRENT (mA)
25
_______________________________________________________________________________________ 5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MAX1606.PDF ] | |
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