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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX662A Datasheet

+12V / 30mA Flash Memory Programming Supply

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MAX662A pdf
19-0253; Rev 1; 8/94
EVFAOLLULAOTWIOSNDKAITTAMSAHNEUEATL
+12V, 30mA Flash Memory
Programming Supply
_______________General Description
The MAX662A is a regulated +12V, 30mA-output, charge-
pump DC-DC converter. It provides the necessary +12V
±5% output to program byte-wide flash memories, and
requires no inductors to deliver a guaranteed 30mA out-
put from inputs as low as 4.75V. It fits into less than 0.1in2
of board space. The MAX662A is a pin-compatible
upgrade to the MAX662, and is recommended for new
designs. The MAX662A offers lower quiescent and shut-
down currents, and guarantees the output current over all
temperature ranges.
The MAX662A is the first charge-pump boost converter to
provide a regulated +12V output. It requires only a few
inexpensive capacitors, and the entire circuit is complete-
ly surface-mountable.
A logic-controlled shutdown pin that interfaces directly
with microprocessors reduces the supply current to only
0.5µA. The MAX662A comes in 8-pin narrow SO and DIP
packages.
For higher-current flash memory programming solutions,
refer to the data sheets for the MAX734 (120mA output
current, guaranteed) and MAX732 (200mA output cur-
rent, guaranteed) PWM, switch-mode DC-DC converters.
Or, refer to the MAX761 data sheet for a 150mA, PFM
switch-mode DC-DC converter that operates from inputs
as low as 2V.
________________________Applications
+12V Flash Memory Programming Supplies
Compact +12V Op-Amp Supplies
Switching MOSFETs in Low-Voltage Systems
Dual-Output +12V and +20V Supplies
____________________________Features
o Regulated +12V ±5% Output Voltage
o 4.5V to 5.5V Supply Voltage Range
o Fits in 0.1in2
o Guaranteed 30mA Output
o No Inductor—Uses Only 4 Capacitors
o 185µA Quiescent Current
o Logic-Controlled 0.5µA Shutdown
o 8-Pin Narrow SO and DIP Packages
______________Ordering Information
PART
MAX662ACPA
MAX662ACSA
MAX662AC/D
MAX662AEPA
MAX662AESA
MAX662AMJA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
8 Plastic DIP
8 SO
8 CERDIP**
* Dice are tested at TA = +25°C.
** Contact factory for availability and processing to MIL-STD-883.
__________Typical Operating Circuit
INPUT
4.75V TO 5.5V
4.7µF
0.22µF
VCC
SHDN
VOUT
MAX662A
C1+ C2-
C1- C2+
GND
OUTPUT
12V ±5%
30mA
0.22µF 4.7µF
Vpp
FLASH
MEMORY
__________________Pin Configuration
TOP VIEW
C1- 1
C1+ 2
C2- 3
C2+ 4
MAX662A
8 SHDN
7 GND
6 VOUT
5 VCC
DIP/SO
________________________________________________________________ Maxim Integrated Products 1
Call toll free 1-800-998-8800 for free samples or literature.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX662A Datasheet

+12V / 30mA Flash Memory Programming Supply

No Preview Available !

MAX662A pdf
+12V, 30mA Flash Memory
Programming Supply
ABSOLUTE MAXIMUM RATINGS
VCC to GND ................................................................-0.3V to 6V
SHDN..........................................................-0.3V to (VCC + 0.3V)
IOUT Continuous..................................................................50mA
Continuous Power Dissipation (TA = +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C) ............727mW
SO (derate 5.88mW/°C above +70°C) .........................471mW
CERDIP (derate 8.00mW/°C above +70°C) .................640mW
Operating Temperature Ranges
MAX662AC_A .....................................................0°C to +70°C
MAX662AE_A ..................................................-40°C to +85°C
MAX662AMJA................................................-55°C to +125°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
(Circuit of Figure 3a, VCC = 4.5V to 5.5V, TA = TMIN to TMAX, unless otherwise noted.)
PARAMETER
Output Voltage
SYMBOL
VOUT
MAX662AC/E
MAX662AM
CONDITIONS
0mA IOUT 30mA,
VCC = 4.75V to 5.5V
0mA IOUT 20mA
0mA IOUT 24mA,
VCC = 4.75V to 5.5V
0mA IOUT 16mA
MIN
11.4
11.4
11.4
11.4
TYP
12
12
12
12
MAX
12.6
UNITS
12.6
12.6
V
12.6
Supply Current
Shutdown Current
Oscillator Frequency
Power Efficiency
VCC-to-VOUT Switch Impedance
Shutdown Input Threshold
SHDN Pin Current
ICC
fOSC
RSW
VIH
VIL
No load, VSHDN = 0V
No load, VSHDN = VCC
VCC = 5V, IOUT = 30mA
VCC = 5V, IOUT = 30mA
VCC = VSHDN = 5V, MAX662AC/E
IOUT = 30mA
MAX662AM
VCC = 5V, VSHDN = 0V
VCC = VSHDN = 5V
185 500 µA
0.5 10 µA
500 kHz
76 %
1
1
2
2.5
k
2.4 V
0.4
-50 -15 -5 µA
0
__________________________________________Typical Operating Characteristics
(Circuit of Figure 3a, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
300
280
TA = -55°C
260
240
220
200 TA = 0°C
180 TA = +25°C
160
140 TA = +125°C
120
100
4.50
4.75 5.00 5.25
SUPPLY VOLTAGE (V)
5.50
OUTPUT VOLTAGE vs. OUTPUT CURRENT
12.6
CONTINUOUS OUTPUT CURRENT MUST
12.4 NOT EXCEED 50mA ABS MAX LIMIT.
12.2 INTERMITTENT PEAK CURRENTS MAY
BE HIGHER.
12.0
11.8
VCC = 4.5V
11.6
VCC = 4.75V
11.4
VCC = 5.0V
11.2
11.0 VCC = 5.5V
10.8
10.6
0 10 20 30 40 50 60 70 80 90 100
OUTPUT CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
100
90
VCC = 5.5V
80
70
VCC = 4.5V
60 VCC = 4.75V
VCC = 5.0V
50
CONTINUOUS OUTPUT CURRENT
40 MUST NOT EXCEED 50mA ABS MAX
LIMIT. INTERMITTENT PEAK
CURRENTS MAY BE HIGHER.
30
0 10 20 30 40 50 60 70 80 90 100
LOAD CURRENT (mA)
2 _______________________________________________________________________________________


Part Number MAX662A
Description +12V / 30mA Flash Memory Programming Supply
Maker Maxim
Total Page 6 Pages
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