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MAX1720
Switched Capacitor Voltage
Inverter with Shutdown
The MAX1720 is a CMOS charge pump voltage inverter that is
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 67
mA,
and a power saving shutdown
input is provided to further reduce the current to a mere 0.4
mA.
The
device contains a 12 kHz oscillator that drives four low resistance
MOSFET switches, yielding a low output resistance of 26
W
and a
voltage conversion efficiency of 99%. This device requires only two
external 10
mF
capacitors for a complete inverter making it an ideal
solution for numerous battery powered and board level applications.
The MAX1720 is available in the space saving TSOP−6 package.
Features
http://onsemi.com
6
1
TSOP−6
SN SUFFIX
CASE 318G
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Operating Voltage Range of 1.15 V to 5.5 V
Output Current Capability in Excess of 50 mA
Low Current Consumption of 67
mA
Power Saving Shutdown Input for a Reduced Current of 0.4
mA
Operation at 12 kHz
Low Output Resistance of 26
W
Space Saving TSOP−6 Package
Pb−Free Package is Available
MARKING DIAGRAM
EACAYW
G
G
1
Typical Applications
LCD Panel Bias
Cellular Telephones
Pagers
Personal Digital Assistants
Electronic Games
Digital Cameras
Camcorders
Hand Held Instruments
−V
out
EAC = Device Code
A
= Assembly Location
Y
= Year
W
= Work Week
G
= Pb−Free Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
V
out
V
in
C−
1
2
3
(Top View)
6
5
4
C+
SHDN
GND
1
V
in
2
3
6
5
ORDERING INFORMATION
4
Device
MAX1720EUT
This device contains 77 active transistors.
MAX1720EUTG
Package
TSOP−6
TSOP−6
(Pb−Free)
Shipping
†
3000 Tape & Reel
3000 Tape & Reel
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:
MAX1720/D
©
Semiconductor Components Industries, LLC, 2005
December, 2005 − Rev. 3
MAX1720
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
ÁÁÁÁ
ÁÁÁÁ
Á
Á
Á Á
Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
Á Á
ÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
Á
Á Á
Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
Á Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
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, C
1
= 10
mF,
C
2
= 10
mF,
T
A
= −40°C to 85°C, typical values shown are for T
A
= 25°C
unless otherwise noted. See Figure 14 for Test Setup.)
Characteristic
Operating Supply Voltage Range (SHDN = V
in
, R
L
= 10 k)
Supply Current Device Operating (SHDN = 5.0 V, R
L
=
R)
T
A
= 25°C
T
A
= 85°C
Supply Current Device Shutdown (SHDN = 0 V)
T
A
= 25°C
T
A
= 85°C
Oscillator Frequency
T
A
= 25°C
T
A
= −40°C to 85°C
Output Resistance (I
out
= 25 mA, Note 2)
Voltage Conversion Efficiency (R
L
=
R)
Power Conversion Efficiency (R
L
= 1.0 k)
Shutdown Input Threshold Voltage (V
in
= 1.5 V to 5.5 V)
High State, Device Operating
Low State, Device Shutdown
Shutdown Input Bias Current
High State, Device Operating, SHDN = 5.0 V
T
A
= 2
T
A
= 85°C5°C
Low State, Device Shutdown, SHDN = 0 V
T
A
= 25°C
T
A
= 85°C
Wake−Up Time from Shutdown (R
L
= 1.0 k)
Symbol
V
in
I
in
−
−
I
SHDN
−
−
f
OSC
8.4
6.0
R
out
V
EFF
P
EFF
V
th(SHDN)
−
−
I
IH
−
−
I
IL
−
−
t
WKUP
−
5.0
100
1.2
−
−
−
ms
5.0
100
−
−
0.6 V
in
0.5 V
in
−
−
pA
−
99
−
12
−
26
99.9
96
15.6
21
50
−
−
W
%
%
V
0.4
1.6
−
−
kHz
67
72
90
100
mA
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
MAX1720
100
R
out
, OUTPUT RESISTANCE (W)
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
R
out
, OUTPUT RESISTANCE (W)
Figure 14 Test Setup
T
A
= 25°C
90
Figure 14 Test Setup
80
70
60
50
V
in
= 3.3 V
40
30
V
in
= 5.0 V
20
−50
−25
0
25
50
75
100
V
in
= 1.5 V
V
in
= 2.0 V
V
in
, SUPPLY VOLTAGE (V)
T
A
, AMBIENT TEMPERATURE (°C)
Figure 2. Output Resistance vs. Supply Voltage
Figure 3. Output Resistance vs. Ambient
Temperature
V
out
, OUTPUT VOLTAGE RIPPLE (mV
p−p
)
400
350
300
250
200
150
100
50
0
0
10
20
30
40
50
C
1
, C
2
, C
3
, CAPACITANCE (mF)
V
in
= 3.15 V
V
out
= −2.50 V
V
in
= 1.90 V
V
out
= −1.50 V
V
in
= 4.75 V
V
out
= −4.00 V
Figure 14 Test Setup
T
A
= 25°C
35
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
= 1.90 V
V
out
= −1.50 V
Figure 14 Test Setup
T
A
= 25°C
V
in
= 3.15 V
V
out
= −2.50 V
V
in
= 4.75 V
V
out
= −4.00 V
Figure 4. Output Current vs. Capacitance
Figure 5. Output Voltage Ripple vs.
Capacitance
f
OSC
, OSCILLATOR FREQUENCY (kHz)
13.0
Figure 14 Test Setup
12.5
12.0
11.5
11.0
10.5
10.0
−50
V
in
= 1.5 V
V
in
= 3.3 V
V
in
= 5.0 V
80
I
in
, SUPPLY CURRENT (mA)
Figure 14 Test Setup
R
L
=
∞
70
T
A
= 85°C
60
T
A
= 25°C
50
T
A
= −40°C
40
30
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
−25
0
25
50
75
100
V
in
, SUPPLY VOLTAGE (V)
T
A
, AMBIENT TEMPERATURE (°C)
Figure 6. Supply Current vs. Supply Voltage
Figure 7. Oscillator Frequency vs. Ambient
Temperature
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3
MAX1720
0.0
V
out
, OUTPUT VOLTAGE (V)
−1.0
−2.0
−3.0
V
in
= 5.0 V
−4.0
−5.0
−6.0
0
10
20
30
40
50
I
out
, OUTPUT CURRENT (mA)
V
in
= 2.0 V
V
in
= 3.3 V
Figure 14 Test Setup
T
A
= 25°C
h,
POWER CONVERSION EFFICIENCY (%)
100
90
80
70
60
50
40
V
in
= 1.5 V
V
in
= 3.3 V
V
in
= 2.0 V
Figure 14 Test Setup
T
A
= 25°C
V
in
= 5.0 V
0
10
20
30
40
50
I
out
, OUTPUT CURRENT (mA)
Figure 8. Output Voltage vs. Output Current
I
SHDN
, SHUTDOWN SUPPLY CURRENT (mA)
Figure 9. Power Conversion Efficiency vs.
Output Current
1.75
1.50
1.25
1.00
0.75
0.50
0.25
−50
V
in
= 1.5 V
R
L
= 10 kW
SHDN = GND
V
in
= 3.3 V
V
in
= 5.0 V
OUTPUT VOLTAGE RIPPLE AND
NOISE = 10 mV / Div. AC COUPLED
Figure 14 Test Setup
V
in
= 3.3 V
I
out
= 5.0 mA
T
A
= 25°C
−25
0
25
50
75
100
TIME = 25
ms
/ Div.
T
A
, AMBIENT TEMPERATURE (°C)
Figure 10. Output Voltage Ripple and Noise
Figure 11. Shutdown Supply Current vs.
Ambient Temperature
SHDN = 5.0V/Div.
5.0
T
A
= 25°C
V
in
, SUPPLY VOLTAGE (V)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
0.5
Low State,
Device Shutdown
High State,
Device Operating
WAKEUP TIME FROM SHUTDOWN
V
in
= 5.0 V
R
L
= 1.0 kW
T
A
= 25°C
V
out
= 1.0 V/Div.
1.0
1.5
2.0
2.5
3.0
TIME = 500
ms
/ Div.
V
th(SHND)
, SHUTDOWN INPUT VOLTAGE THRESHOLD (V)
Figure 12. Supply Voltage vs. Shutdown Input
Voltage Threshold
Figure 13. Wakeup Time From Shutdown
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