MAX828, MAX829
Switched Capacitor
Voltage Converter
The MAX828 and MAX829 are CMOS charge pump voltage
inverters that are designed for operation over an input voltage range of
1.15 V to 5.5 V with an output current capability in excess of 50 mA.
The operating current consumption is only 68
mA
for the MAX828 and
118
mA
for the MAX829. The devices contain an internal oscillator
that operates at 12 kHz for the MAX828 and 35 kHz for the MAX829.
The oscillator drives four low resistance MOSFET switches, yielding
a low output resistance of 26
W
and a voltage conversion efficiency of
99.9%. These devices require only two external capacitors, 10
mF
for
the MAX828 and 3.3
mF
for the MAX829, for a complete inverter
making it an ideal solution for numerous battery powered and board
level applications. The MAX828 and MAX829 are available in the
TSOP−5 package.
Features
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TSOP−5
CASE 483
1
MARKING DIAGRAM
•
Operating Voltage Range of 1.15 V to 5.5 V
•
Output Current Capability in Excess of 50 mA
•
Low Current Consumption of 68
mA
(MAX828) or
•
•
•
•
•
•
•
•
•
•
•
•
EAx AYW
G
G
1
= Device Code
x= A or B
A
= Assembly Location
Y
= Year
W
= Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
EAx
118
mA
(MAX829)
Operation at 12 kHz (MAX828) or 35 kHz (MAX829)
Low Output Resistance of 26
W
Space Saving TSOP−5 Package
Pb−Free Packages are Available
Typical Applications
PIN CONFIGURATION
V
out
V
in
C
−
1
2
3
(Top View)
4
GND
5
C
+
LCD Panel Bias
Cellular Telephones
Pagers
Personal Digital Assistants
Electronic Games
Digital Cameras
Camcorders
Hand−Held Instruments
−V
out
1
V
in
2
3
4
5
ORDERING INFORMATION
Device
MAX828EUK
MAX828EUKG
MAX829EUK
MAX829EUKG
Package
TSOP−5
TSOP−5
(Pb−Free)
TSOP−5
TSOP−5
(Pb−Free)
Shipping
†
3000 Tape/Reel
3000 Tape/Reel
3000 Tape/Reel
3000 Tape/Reel
This device contains 77 active transistors.
Figure 1. Typical Application
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
1
Publication Order Number:
MAX828/D
©
Semiconductor Components Industries, LLC, 2005
December, 2005 − Rev. 4
MAX828, MAX829
MAXIMUM RATINGS*
Rating
Input Voltage Range (V
in
to GND)
Symbol
V
in
Value
−0.3 to 6.0
−6.0 to 0.3
100
Unit
V
V
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
Á
Á Á
Á Á
ÁÁÁ
Á
Á
ÁÁÁ
Á
Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁ Á
Á Á
Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁ
Á
Á Á
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á
Output Voltage Range (V
out
to GND)
Output Current (Note 1)
V
out
I
out
mA
Output Short Circuit Duration (V
out
to GND, Note 1)
Operating Junction Temperature
t
SC
T
J
Indefinite
150
256
313
sec
°C
Power Dissipation and Thermal Characteristics
Thermal Resistance, Junction to Air
Maximum Power Dissipation @ T
A
= 70°C
Storage Temperature
R
qJA
P
D
T
stg
°C/W
mW
°C
−55 to 150
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
*ESD Ratings
ESD Machine Model Protection up to 200 V, Class B
ESD Human Body Model Protection up to 2000 V, Class 2
ELECTRICAL CHARACTERISTICS
(V
in
= 5.0 V for MAX828 C
1
= C
2
= 10
mF,
for MAX829 C
1
= C
2
= 3.3
mF,
T
A
= −40°C to 85°C, typical
values shown are for T
A
= 25°C unless otherwise noted. See Figure 20 for test setup.)
Characteristic
Operating Supply Voltage Range (R
L
= 10 k)
Supply Current Device Operating (R
L
=
R)
T
A
= 25°C
MAX828
MAX829
T
A
= 85°C
MAX828
MAX829
Oscillator Frequency
T
A
= 25°C
MAX828
MAX829
T
A
= −40°C to 85°C
MAX828
MAX829
Output Resistance (I
out
= 25 mA, Note 2)
MAX828
MAX829
Voltage Conversion Efficiency (R
L
=
R)
Power Conversion Efficiency (R
L
= 1.0 k)
Symbol
V
in
I
in
−
−
−
−
f
OSC
8.4
24.5
6.0
19
R
out
−
−
V
EFF
P
EFF
99
−
26
26
99.9
96
50
50
−
−
%
%
12
35
−
−
15.6
45.6
21
54
W
68
118
73
128
90
200
100
200
kHz
Min
1.5 to 5.5
Typ
1.15 to 6.0
Max
−
Unit
V
mA
1. Maximum Package power dissipation limits must be observed to ensure that the maximum junction temperature is not exceeded.
TJ
+
TA
)
(PD R
qJA
)
2. Capacitors C
1
and C
2
contribution is approximately 20% of the total output resistance.
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2
MAX828, MAX829
100
R
out
, OUTPUT RESISTANCE
(W)
Figure 20 Test Setup
90
80
70
60
50
40
30
20
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
T
A
= 25°C
100
R
out
, OUTPUT RESISTANCE
(W)
Figure 20 Test Setup
90
80
70
60
50
40
30
20
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
T
A
= 25°C
V
in
, SUPPLY VOLTAGE (V)
V
in
, SUPPLY VOLTAGE (V)
Figure 2. Output Resistance vs. Supply Voltage
MAX828
90
R
out
, OUTPUT RESISTANCE
(W)
Figure 20 Test Setup
80
70
60
50
40
30
20
−50
V
in
= 5.0 V
−25
0
25
50
75
100
V
in
= 3.3 V
V
in
= 2.0 V
V
in
= 1.5 V
100
R
out
, OUTPUT RESISTANCE
(W)
Figure 3. Output Resistance vs. Supply Voltage
MAX829
Figure 20 Test Setup
90
80
70
60
50
40
V
in
= 3.3 V
30
20
−50
−25
0
25
50
75
100
V
in
= 5.0 V
V
in
= 2.0 V
V
in
= 1.5 V
T
A
, AMBIENT TEMPERATURE (°C)
T
A
, AMBIENT TEMPERATURE (°C)
Figure 4. Output Resistance vs. Ambient
Temperature MAX828
35
Figure 20 Test Setup
I
out
, OUTPUT CURRENT (mA)
30
25
20
15
10
5
0
0
10
20
30
40
50
C
1
, C
2
, C
3
, CAPACITANCE (mF)
V
in
= 1.9 V
V
out
= −1.5 V
V
in
= 4.75 V
V
out
= −4.0 V
V
in
= 3.15 V
V
out
= −2.5 V
T
A
= 25°C
I
out
, OUTPUT CURRENT (mA)
30
25
20
15
10
5
0
0
35
Figure 5. Output Resistance vs. Ambient
Temperature MAX829
Figure 20 Test Setup
V
in
= 4.75 V
V
out
= −4.0 V
V
in
= 3.15 V
V
out
= −2.5 V
T
A
= 25°C
V
in
= 1.9 V
V
out
= −1.5 V
10
20
30
40
50
C
1
, C
2
, C
3
, CAPACITANCE (mF)
Figure 6. Output Current vs. Capacitance MAX828
Figure 7. Output Current vs. Capacitance MAX829
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3
MAX828, MAX829
V
out
, OUTPUT VOLTAGE RIPPLE (mVpp)
400
350
300
250
200
150
100
50
0
0
V
out
, OUTPUT VOLTAGE RIPPLE (mVpp)
Figure 20 Test Setup
V
in
= 4.75 V
V
out
= −4.0 V
V
in
= 3.15 V
V
out
= −2.5 V
V
in
= 1.9 V
V
out
= −1.5 V
T
A
= 25°C
350
300
250
200
150
100
50
0
0
Figure 20 Test Setup
T
A
= 25°C
V
in
= 4.75 V
V
out
= −4.0 V
V
in
= 3.15 V
V
out
= −2.5 V
V
in
= 1.9 V
V
out
= −1.5 V
10
20
30
40
50
10
20
30
40
50
C
1
, C
2
, C
3
, CAPACITANCE (mF)
C
1
, C
2
, C
3
, CAPACITANCE (mF)
Figure 8. Output Voltage Ripple vs.
Capacitance MAX828
90
Figure 20 Test Setup
I
in
, SUPPLY CURRENT (mA)
80
70
T
A
= 85°C
60
50
40
30
20
1.5
T
A
= −40°C
T
A
= 25°C
R
L
=
∞
I
in
, SUPPLY CURRENT (mA)
130
Figure 9. Output Voltage Ripple vs.
Capacitance MAX829
Figure 20 Test Setup
120
110
100
90
80
70
60
50
T
A
= −40°C
T
A
= 25°C
T
A
= 85°C
R
L
=
∞
2.0
2.5
3.0
3.5
4.0
4.5
5.0
40
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
V
in
, SUPPLY VOLTAGE (V)
V
in
, SUPPLY VOLTAGE (V)
Figure 10. Supply Current vs. Supply Voltage
MAX828
f
OSC
, OSCILLATOR FREQUENCY (kHz)
f
OSC
, OSCILLATOR FREQUENCY (kHz)
13.0
Figure 20 Test Setup
12.5
V
in
= 5.0 V
12.0
11.5
11.0
V
in
= 1.5 V
10.5
10.0
−50
V
in
= 3.3 V
40
Figure 11. Supply Current vs. Supply Voltage
MAX829
Figure 20 Test Setup
39
38
37
36
35
34
33
32
−50
−25
0
25
50
75
100
V
in
= 5.0 V
V
in
= 1.5 V
V
in
= 3.3 V
−25
0
25
50
75
100
T
A
, AMBIENT TEMPERATURE (°C)
T
A
, AMBIENT TEMPERATURE (°C)
Figure 12. Oscillator Frequency vs. Ambient
Temperature MAX828
Figure 13. Oscillator Frequency vs. Ambient
Temperature MAX829
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4
MAX828, MAX829
0
Figure 20 Test Setup
V
out
, OUTPUT VOLTAGE (V)
−1.0
−2.0
−3.0
−4.0
−5.0
−6.0
0
V
in
= 5.0 V
V
in
= 3.3 V
V
in
= 2.0 V
T
A
= 25°C
V
out
, OUTPUT VOLTAGE (V)
0
Figure 20 Test Setup
−1.0
−2.0
−3.0
−4.0
−5.0
−6.0
0
V
in
= 5.0 V
V
in
= 3.3 V
V
in
= 2.0 V
T
A
= 25°C
10
20
30
40
50
10
20
30
40
50
I
out
, OUTPUT CURRENT (mA)
I
out
, OUTPUT CURRENT (mA)
Figure 14. Output Voltage vs. Output Current
MAX828
η,
POWER CONVERSION EFFICIENCY (%)
η,
POWER CONVERSION EFFICIENCY (%)
100
Figure 20 Test Setup
90
80
70
60
50
40
0
V
in
= 1.5 V
V
in
= 2.0 V
T
A
= 25°C
10
20
30
40
50
V
in
= 3.3 V
V
in
= 5.0 V
100
Figure 15. Output Voltage vs. Output Current
MAX829
Figure 20 Test Setup
90
80
70
60
50
40
0
V
in
= 1.5 V
V
in
= 2.0 V
T
A
= 25°C
10
20
30
40
50
V
in
= 3.3 V
V
in
= 5.0 V
I
out
, OUTPUT CURRENT (mA)
I
out
, OUTPUT CURRENT (mA)
OUTPUT VOLTAGE RIPPLE & NOISE = 10 mV/Div.
AC COUPLED
Figure 20 Test Setup
V
in
= 3.3 V
I
out
= 5.0 mA
T
A
= 25°C
OUTPUT VOLTAGE RIPPLE & NOISE = 10 mV/Div.
AC COUPLED
Figure 16. Power Conversion Efficiency vs.
Output Current MAX828
Figure 17. Power Conversion Efficiency vs.
Output Current MAX829
Figure 20 Test Setup
V
in
= 3.3 V
I
out
= 5.0 mA
T
A
= 25°C
TIME = 25
ms/div
TIME = 10
ms/div
Figure 18. Output Voltage Ripple and Noise
MAX828
Figure 19. Output Voltage Ripple and Noise
MAX829
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