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MAX662AESA+T

P1-P3P4-P6
_______________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 0.1in
2
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
♦ Regulated +12V ±5% Output Voltage
♦ 4.5V to 5.5V Supply Voltage Range
♦ Fits in 0.1in
2
♦ Guaranteed 30mA Output
♦ No Inductor—Uses Only 4 Capacitors
♦ 185µA Quiescent Current
♦ Logic-Controlled 0.5µA Shutdown
♦ 8-Pin Narrow SO and DIP Packages
______________Ordering Information
MAX662A
+12V, 30mA Flash Memory
Programming Supply
________________________________________________________________
Maxim Integrated Products
1
1
2
3
4
8
7
6
5
SHDN
GND
V
OUT
V
CC
C2+
C2-
C1+
C1-
MAX662A
DIP/SO
TOP VIEW
__________________Pin Configuration
MAX662A
FLASH
MEMORY
4.7µF
4.7µF
0.22µF 0.22µF
OUTPUT
12V ±5%
30mA
V
CC
SHDN
C1+
C1-
V
OUT
C2-
C2+
GND
INPUT
4.75V TO 5.5V
V
pp
__________Typical Operating Circuit
Call toll free 1-800-998-8800 for free samples or literature.
19-0253; Rev 1; 8/94
EVALUATION KIT MANUAL
FOLLOWS DATA SHEET
PART
MAX662ACPA
MAX662ACSA
MAX662AC/D 0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
8 Plastic DIP
8 SO
Dice*
MAX662AEPA -40°C to +85°C 8 Plastic DIP
MAX662AESA -40°C to +85°C 8 SO
MAX662AMJA -55°C to +125°C 8 CERDIP**
* Dice are tested at T
A
= +25°C.
** Contact factory for availability and processing to MIL-STD-883.
MAX662A
+12V, 30mA Flash Memory
Programming Supply
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 3a, V
CC
= 4.5V to 5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
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.
V
CC
to GND ................................................................-0.3V to 6V
SHDN..........................................................-0.3V to (V
CC
+ 0.3V)
I
OUT
Continuous..................................................................50mA
Continuous Power Dissipation (T
A
= +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
MAX662AC/E
V
CC
= V
SHDN
= 5V,
I
OUT
= 30mA
V
CC
= 5V, I
OUT
= 30mA
MAX662AM
No load, V
SHDN
= 0V
No load, V
SHDN
= V
CC
V
CC
= V
SHDN
= 5V
V
CC
= 5V, I
OUT
= 30mA
V
CC
= 5V, V
SHDN
= 0V
CONDITIONS
µA
0
SHDN Pin Current
-50 -15 -5
11.4 12 12.6
11.4 12 12.6
11.4 12 12.6
V
0.4V
IL
Shutdown Input Threshold
2.4V
IH
kΩ
12
R
SW
V
CC
-to-V
OUT
Switch Impedance
%76Power Efficiency
V
11.4 12 12.6
V
OUT
Output Voltage
µA185 500I
CC
Supply Current
µA0.5 10Shutdown Current
kHz500f
OSC
Oscillator Frequency
UNITSMIN TYP MAXSYMBOLPARAMETER
__________________________________________Typical Operating Characteristics
(Circuit of Figure 3a, T
A
= +25°C, unless otherwise noted.)
100
4.50 5.25
SUPPLY CURRENT vs. SUPPLY VOLTAGE
140
300
MAX662A-01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
220
180
4.75
260
5.00
120
160
200
240
280
5.50
T
A
= -55°C
T
A
= 0°C
T
A
= +25°C
T
A
= +125°C
12.6
10.6
0 20 60 100
OUTPUT VOLTAGE vs. OUTPUT CURRENT
11.0
12.2
MAX662A-02
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
40 80
11.8
11.4
10 30 50 70 90
10.8
11.2
11.6
12.0
12.4
V
CC
= 5.5V
V
CC
= 5.0V
V
CC
= 4.75V
V
CC
= 4.5V
CONTINUOUS OUTPUT CURRENT MUST 
NOT EXCEED 50mA ABS MAX LIMIT. 
INTERMITTENT PEAK CURRENTS MAY 
BE HIGHER.
30
0 20 60 100
EFFICIENCY vs. LOAD CURRENT
50
MAX662A-03
LOAD CURRENT (mA)
EFFICIENCY (%)
40 80
90
70
10 30 50 70 90
40
60
80
100
V
CC
= 5.5V
V
CC
= 5.0V
V
CC
= 4.75V
V
CC
= 4.5V
CONTINUOUS OUTPUT CURRENT
MUST NOT EXCEED 50mA ABS MAX
LIMIT. INTERMITTENT PEAK
CURRENTS MAY BE HIGHER.
0mA ≤ I
OUT
≤ 30mA,
V
CC
= 4.75V to 5.5V
0mA ≤ I
OUT
≤ 20mA
0mA ≤ I
OUT
≤ 24mA,
V
CC
= 4.75V to 5.5V
0mA ≤ I
OUT
≤ 16mA
MAX662AC/E
MAX662AM 1 2.5
MAX662A
+12V, 30mA Flash Memory
Programming Supply
_______________________________________________________________________________________ 3
LOAD-TRANSIENT RESPONSE
A: OUTPUT CURRENT, 20mA/div, I
OUT
= 0mA to 30mA
B: OUTPUT VOLTAGE RIPPLE, 100mV/div, V
CC
= 5.0V
1ms/div
A
B
0mA
_____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 3a, T
A
= +25°C, unless otherwise noted.)
LINE-TRANSIENT RESPONSE
A: SUPPLY VOLTAGE, 2V/div, V
CC
= 4.5V to 5.5V, I
OUT
= 30mA
B: OUTPUT VOLTAGE RIPPLE, 200mV/div
1ms/div
A
B
0V
0V
_____________________Pin Description
NAME FUNCTION
1 C1-
Negative terminal for the first charge-
pump capacitor
PIN
2 C1+
Positive terminal for the first charge-
pump capacitor
4 C2+
Positive terminal for the second
charge-pump capacitor
3 C2-
Negative terminal for the second
charge-pump capacitor
7 GND Ground
6 V
OUT
+12V Output Voltage. V
OUT
= V
CC
when in shutdown mode.
5 V
CC
Supply Voltage
8
Active-high CMOS-logic level
Shutdown Input. SHDN is internally
pulled up to V
CC
. Connect to GND for
normal operation. In shutdown mode,
the charge pumps are turned off and
V
OUT
= V
CC
.
SHDN
MAX662A
C1-
C1+
C2-
C2+
C4
4.7µF
0.22µF
0.22µF
V
CC
V
CC
S1
S2
S1
S1
S1
S2
S2
GND
OSCILLATOR
VREF
R1
R2
SHDN
V
OUT
C5
4.7µF
C3*
0.1µF
+12V
SWITCH CLOSURES SHOWN FOR CHARGE PUMP IN THE TRANSFER MODE
* C3 NOT REQUIRED. FOR MAX662 ONLY.
ERROR
AMP
Figure 1. Block Diagram
P1-P3P4-P6

MAX662AESA+T

Mfr. #:
Buy MAX662AESA+T
Manufacturer:
Maxim Integrated
Description:
Switching Voltage Regulators 12V 30mA Flash Programming Supply
Lifecycle:
New from this manufacturer.
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