19-0459; Rev 1; 1/99
Low-Profile, 5V/12V or Adjustable, Step-Up
DC-DC Converters for Flash Memory/PCMCIA Cards
General Description
The MAX606/MAX607 are the smallest CMOS, step-up
DC-DC converters available for flash memory and PC
(PCMCIA) cards. They switch at up to 1MHz, permitting
the entire circuit to fit in 0.25in
2
, yet remain under
1.35mm high to fit Type 1, 2, and 3 card standards.
These devices operate from a 3V to 5.5V input and pro-
vide a ±4% accurate output that is preset to 5V or 12V,
or adjustable from V
IN
to 12.5V. They can provide up to
180mA of output current at 5V.
The MAX606 switches at up to 1MHz and fits Type 1
(thinnest standard) flash memory and PCMCIA cards. It
uses a thin, 1.19mm high, 5µH inductor and small,
0.68µF output capacitors. The entire circuit fits in
0.25in
2
and is less than 1.35mm high.
The MAX607 switches at up to 500kHz, fitting Type 2
and 3 cards, as well as hand-held devices where
height requirements are not as critical. It uses less
board area than the MAX606, fitting in 0.16in
2
, but
requires 2.5mm of height. It also has a lower no-load
supply current than the MAX606.
Both devices use a unique control scheme that optimizes
efficiency over all input and output voltages. Other fea-
tures include 1µA logic-controlled shutdown and user-
controlled soft-start to minimize inrush currents.
The MAX606/MAX607 come in 8-pin µMAX and SO
packages. The µMAX package uses half the board
area of a standard 8-pin SO and has a maximum height
of just 1.11mm.
UAL
IT MAN
TION K
A
SHEET
EVALU
S DATA
W
FOLLO
____________________________Features
o
Lowest-Height Circuit (1.35mm max)
o
±4% Regulated Output (5V, 12V, or Adjustable)
o
Up to 180mA Load Current
o
1MHz Switching Frequency (MAX606)
o
1µA Logic-Controlled Shutdown
o
3V to 5.5V Input Voltage Range
o
Compact 8-Pin µMAX Package
MAX606/MAX607
Ordering Information
PART
MAX606ESA
MAX606EUA
MAX607ESA
MAX607EUA
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 SO
8 µMAX
8 SO
8 µMAX
________________________Applications
PCMCIA Cards
Memory Cards
Single PCMCIA Slot Programming
Digital Cameras
Flash Memory Programming
Hand-Held Equipment
INPUT
+4.5V TO +5.5V
Typical Operating Circuit
Pin Configuration
TOP VIEW
PGND
FB
SHDN
IN
1
2
3
4
8
LX
OUT
SS
GND
0.68µF
0.68µF
0.1µF
5µH
IN
OUTPUT
12V @ 90mA
0.68µF
x2
ON/OFF
SHDN
LX
FB
MAX606
OUT
GND
MAX606
MAX607
SO/µMAX
7
6
5
PGND
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Low-Profile, 5V/12V or Adjustable, Step-Up
DC-DC Converters for Flash Memory/PCMCIA Cards
MAX606/MAX607
ABSOLUTE MAXIMUM RATINGS
IN to GND .................................................................-0.3V to +6V
LX, OUT to GND .....................................................-0.3V to +15V
PGND to GND.....................................................................±0.3V
FB to GND ..................................................-0.3V to (V
CC
+ 0.3V)
SS, SHDN to GND ....................................................-0.3V to +6V
Continuous Power Dissipation (T
A
= +70°C)
µMAX (derate 4.10mW/°C above +70°C) ....................330mW
SO (derate 5.88mW/°C above +70°C) .........................471mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature .......................................................+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
IN
= 3.3V, GND = PGND = FB = 0V,
SHDN
= IN,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Supply Voltage
Undervoltage Lockout Threshold
Output Voltage (Note 1)
FB Regulation Setpoint
Adjustable Output Voltage Range
Line Regulation
Switch On-Resistance
Switch Off-Leakage
Switch Current Limit
SS Resistance
Quiescent Supply Current
Shutdown Quiescent Current
OUT Input Current
Switch On-Time Constant (K)
Switch Off-Time Ratio
SHDN
Input Low Voltage
SHDN
Input High Voltage
SHDN
Input Current
FB Input Low Voltage
FB Input High Voltage
FB Input Current
V
SHDN
= V
IN
, V
SS
= 150mV
V
SHDN
= V
SS
= 0
V
OUT
= 13V
V
SHDN
= 0, OUT = IN
V
OUT
= 13V
3V < V
IN
< 5.5V
(t
ON
= K / V
IN
)
MAX606
MAX607
1.9
3.8
0.3
3.0
6.0
MAX606
MAX607
250
150
0.01
V
LX
= 12V
0.7
30
45
3V < V
IN
< 5V, FB = IN, I
LOAD
= 0 to 180mA
4.5V < V
IN
< 5.5V, FB = GND, I
LOAD
= 0 to 120mA
0.1V < V
FB
< (V
IN
- 0.1V)
0.1V < V
FB
< (V
IN
- 0.1V)
V
IN
= 3V to 5.5V
4.8
11.5
1.96
V
IN
0.5
0.4
1
10
1.1
60
0.5
500
300
10
80
4.3
8.6
0.7
0.25V
IN
0.66V
IN
±1
0.1
V
IN
- 0.1
200
V
V
µA
V
V
nA
CONDITIONS
MIN
3.0
2.4
5.0
12.0
2.00
TYP
MAX
5.5
2.8
5.2
12.5
2.04
12.5
UNITS
V
V
V
V
V
%
Ω
µA
A
kΩ
µA
µA
µA
µs-A
2V < (V
OUT
+ 0.5V - V
IN
) < 8V (see
Pulse-
Frequency-Modulation Control Scheme
section)
V
IN
= 3V
V
IN
= 5.5V
V
SHDN
= 0 or V
IN
V
IN
= 3V to 5.5V. For V
FB
below this voltage,
output regulates to 12V.
V
IN
= 3V to 5.5V. For V
FB
above this voltage,
output regulates to 5V.
V
FB
= 2.05V, V
OUT
= 13V
2
_______________________________________________________________________________________
Low-Profile, 5V/12V or Adjustable, Step-Up
DC-DC Converters for Flash Memory/PCMCIA Cards
ELECTRICAL CHARACTERISTICS
(V
IN
= 3.3V, GND = PGND = FB = 0V,
SHDN
= IN,
T
A
= -40°C to +85°C,
unless otherwise noted.) (Note 2)
PARAMETER
Supply Voltage
Undervoltage Lockout Threshold
Output Voltage (Note 1)
FB Regulation Setpoint
Adjustable Output Voltage Range
Switch On-Resistance
Switch Off-Leakage
Switch Current Limit
SS Resistance
Quiescent Supply Current
Shutdown Quiescent Current
OUT Input Current
Switch On-Time Constant (K)
Switch Off-Time Ratio
SHDN
Input Low Voltage
SHDN
Input High Voltage
SHDN
Input Current
FB Input Low Voltage
FB Input High Voltage
FB Input Current
V
SHDN
= V
IN
, V
SS
= 150mV
V
SHDN
= V
SS
= 0
V
OUT
= 13V
V
SHDN
= 0, OUT = IN
V
OUT
= 13V
3V < V
IN
< 5.5V
(t
ON
= K / V
IN
)
MAX606
MAX607
1.8
3.5
0.3
MAX606
MAX607
V
LX
= 12V
0.55
30
3V < V
IN
< 5V, FB = IN, I
LOAD
= 0 to 135mA
4.5V < V
IN
< 5.5V, FB = GND, I
LOAD
= 0 to 90mA
0.1V < V
FB
< (V
IN
- 0.1V)
0.1V < V
FB
< (V
IN
- 0.1V)
4.75
11.4
1.94
V
IN
CONDITIONS
MIN
3.0
2.4
TYP
MAX
5.5
2.8
5.25
12.6
2.06
12.5
1
10
1.25
60
0.5
500
300
10
85
4.5
9.0
0.7
0.25V
IN
0.66V
IN
±1
0.1
V
IN
- 0.1
200
V
V
µA
V
V
nA
UNITS
V
V
V
V
V
Ω
µA
A
kΩ
µA
µA
µA
µs-V
MAX606/MAX607
2V < (V
OUT
+ 0.5V - V
IN
) < 8V (see
Pulse-
Frequency-Modulation Control Scheme
section)
V
IN
= 3V
V
IN
= 5.5V
V
SHDN
= 0 or V
IN
V
IN
= 3V to 5.5V. For V
FB
below this voltage,
output regulates to 12V.
V
IN
= 3V to 5.5V. For V
FB
above this voltage,
output regulates to 5V.
V
FB
= 2.05V, V
OUT
= 13V
Note 1:
The load specification is guaranteed by DC parametric tests and is not production tested in circuit.
Note 2:
Specifications to -40°C are guaranteed by design, not production tested.
_______________________________________________________________________________________
3
Low-Profile, 5V/12V or Adjustable, Step-Up
DC-DC Converters for Flash Memory/PCMCIA Cards
MAX606/MAX607
Typical Operating Characteristics
(V
IN
= 3.3V, T
A
= +25°C, unless otherwise noted.)
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
MAX606/07toc01
MAX606
EFFICIENCY vs. OUTPUT CURRENT
MAX606/7 TOC02
MAX607
EFFICIENCY vs. OUTPUT CURRENT
90
80
EFFICIENCY (%)
70
60
50
40
30
A: V
OUT
= 12V, V
IN
= 3.3V
B: V
OUT
= 5V, V
IN
= 3.3V
C: V
OUT
= 12V, V
IN
= 5V
D: V
OUT
= 5V, V
IN
= 5V
0.01
0.1
1
10
100
1000
OUTPUT CURRENT (mA)
C
IN
= 2 x 1µF
C
OUT
= 4.7µF
B
A
D
C
MAX606/7 TOC03
MAX606/07-09
MAX606/7 TOC-06
700
MAX606 (V
OUT
= 5V)
MAXIMUM OUTPUT CURRENT (mA)
600
MAX607 (V
OUT
= 5V)
500
100
90
80
EFFICIENCY (%)
70
60
50
40
30
C
IN
= 2 x 1µF
C
OUT
= 4.7µF
C
A
100
D
B
400
300
200
100
0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
INPUT VOLTAGE (V)
MAX606 (V
OUT
= 12V)
MAX607 (V
OUT
= 12V)
20
10
0
0.01
0.1
1
A: V
OUT
= 12V, V
IN
= 3.3V
B: V
OUT
= 5V, V
IN
= 3.3V
C: V
OUT
= 12V, V
IN
= 5V
D: V
OUT
= 5V, V
IN
= 5V
10
100
1000
OUTPUT CURRENT (mA)
20
10
0
SHUTDOWN QUIESCENT CURRENT
vs. TEMPERATURE
MAX606/7 TOC04
SWITCH ON-TIME vs.
INPUT VOLTAGE
MAX606/7 TOC-05
SWITCH OFF-TIME vs.
OUTPUT VOLTAGE
4000
3500
SWITCH OFF-TIME (ns)
3000
2500
D
2000
1500
1000
500
0
B
A
C
A: MAX607, V
IN
= 5V
B: MAX606, V
IN
= 5V
C: MAX607, V
IN
= 3.3V
D: MAX606, V
IN
= 3V
1.0
0.9
0.8
SHUTDOWN I
Q
(µA)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
FOR V
IN
= 3V, 3.3V, AND 5V
5 MINUTE WAIT BEFORE MEASUREMENT
3000
2500
SWITCH ON-TIME (ns)
2000
1500
1000
500
0
2.5
MAX607
MAX606
-40
-20
0
20
40
60
80
3.0
3.5
4.0
4.5
5.0
5.5
2
3
4
5
6
7
8
9
10 11 12
TEMPERATURE (°C)
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
MAX606
NO-LOAD SUPPLY CURRENT
vs. TEMPERATURE
MAX606/7-07
MAX607
NO-LOAD SUPPLY CURRENT
vs. TEMPERATURE
A: V
OUT
= 12V, MBR0520 DIODE
B: V
OUT
= 12V, MBR0540 DIODE
C: V
OUT
= 5V, MBR0520 DIODE
D: V
OUT
= 5V, MBR0540 DIODE
MAX606/7-08
DIODE LEAKAGE CURRENT
vs. TEMPERATURE
10,000
1000
LEAKAGE CURRENT (µA)
100
10
1
0.1
0.01
V
OUT
= V
ANODE
= 12V
0.001
MBR0530
MBR0520L
MBR0540
10,000
NO-LOAD SUPPLY CURRENT (µA)
1000
V
IN
= 3.3V
A
B
C
D
NO-LOAD SUPPLY CURRENT (µA)
A: V
OUT
= 12V, MBR0520 DIODE
B: V
OUT
= 12V, MBR0540 DIODE
C: V
OUT
= 5V, MBR0520 DIODE
D: V
OUT
= 5V, MBR0540 DIODE
10,000
1000
V
IN
= 3.3V
A
B
C
D
100
-40
-20
0
20
40
60
80
TEMPERATURE (
˚
C)
100
-40
-20
0
20
40
60
80
TEMPERATURE (
˚
C)
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
4
_______________________________________________________________________________________
Low-Profile, 5V/12V or Adjustable, Step-Up
DC-DC Converters for Flash Memory/PCMCIA Cards
Typical Operating Characteristics (continued)
(V
IN
= 3.3V, T
A
= +25°C, unless otherwise noted.)
MAX606
MAXIMUM OUTPUT CURRENT
vs. INDUCTOR VALUE
MAX606/07-10
MAX606/MAX607
MAX607
MAXIMUM OUTPUT CURRENT
vs. INDUCTOR VALUE
MAX606/07-11
START-UP DELAY vs. SOFT START
CAPACITOR
1800
1600
START-UP DELAY (µs)
1400
1200
1000
800
600
400
200
0
V
IN
= 3.3V
C
1x10
1
1x10
2
1x10
3
1x10
4
D
1x10
5
A
B
A: MAX607 V
OUT
= 12V
B: MAX606 V
OUT
= 12V
C: MAX607 V
OUT
= 5V
D: MAX606 V
OUT
= 5V
MAX606/07-12a
400
MAXIMUM OUTPUT CURRENT (mA)
350
300
250
200
150
100
50
0
1x10
0
INDUCTOR VALUE (µH)
A: V
OUT
= 5V, V
IN
= 3.3V
B: V
OUT
= 12V, V
IN
= 5V
C: V
OUT
= 12V, V
IN
= 3.3V
C
B
A
400
MAXIMUM OUTPUT CURRENT (mA)
350
300
250
200
150
100
50
C
A: V
OUT
= 5V, V
IN
= 3.3V
B: V
OUT
= 12V, V
IN
= 5V
C: V
OUT
= 12V, V
IN
= 3.3V
A
20,800
B
1x10
1
0
1x10
0
INDUCTOR VALUE (µH)
1x10
1
SOFT-START CAPACITOR (pF)
MAX606
START-UP DELAY AND INRUSH CURRENT
2V
12V
MAX607
START-UP DELAY AND INRUSH CURRENT
2V
12V
SHDN
2V/div
OUTPUT
5V/div
SHDN
2V/div
OUTPUT
5V/div
400mA
INPUT
200mA/div
50µs/div
I
LOAD
= 1mA, INPUT = 3.3V, C
SS
= 10nF, C
OUT
= 2 x 0.68µF
200mA
INPUT
200mA/div
100µs/div
I
LOAD
= 1mA, INPUT = 3.3V, C
SS
= 10nF, C
OUT
= 4.7µF
_______________________________________________________________________________________
5
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