Rainbow Electronics MAX1721 User Manual
Page 2
MAX1719/MAX1720/MAX1721
SOT23, Switched-Capacitor
Voltage Inverters with Shutdown
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= +5V, SHDN = GND (MAX1719),
SHDN = IN (MAX1720/MAX1721), C1 = C2 = 10µF (MAX1720), C1 = C2 = 1µF
(MAX1719/MAX1721), circuit of Figure 1,
T
A
= -40°C to +85°C
, unless otherwise noted. Typical values are at T
A
= +25°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.
IN to GND .................................................................-0.3V to +6V
OUT to GND .............................................................-6V to +0.3V
C1+, SHDN, SHDN to GND .........................-0.3V to (V
IN
+ 0.3V)
C1- to GND ...............................................(V
OUT
- 0.3V) to +0.3V
OUT Output Current..........................................................100mA
OUT Short Circuit to GND..............................................Indefinite
Continuous Power Dissipation (T
A
= +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C).................696mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
I
OUT
= 5mA
MAX1719/MAX1721
R
L
= 10k
Ω
SHDN/ SHDN = GND
or V
IN
V
IN (MIN)
≤
V
IN
≤
+2.5V
MAX1720
R
L
= 10k
Ω
+2.5V
≤
V
IN
≤
+5.5V
V
IN (MIN)
≤
V
IN
≤
+2.5V
+2.5V
≤
V
IN
≤
+5.5V
I
OUT
= 0, T
A
= +25°C
SHDN = IN (MAX1719), SHDN = GND
(MAX1720/MAX1721), OUT is internally
forced to GND in shutdown
T
A
= +25°C
T
A
= +25°C
SHDN = IN (MAX1719),
SHDN = GND
(MAX1720/MAX1721)
I
OUT
= 10mA
CONDITIONS
80
µs
800
Wake-Up Time from Shutdown
10
nA
-100
0.05
100
I
IL
, I
IH
SHDN/ SHDN Bias Current
0.2
V
0.6
V
IL
SHDN/ SHDN Input Logic Low
V
IN
- 0.2
V
2.0
V
IH
SHDN/ SHDN Input Logic High
Ω
4
12
R
O
,
SHDN
OUT to GND
Shutdown Resistance
65
Ω
23
50
R
O
Output Resistance (Note 1)
1.4
5.5
1.5
5.5
V
1.25
5.5
V
IN
Supply Voltage Range
%
99
99.9
Voltage Conversion Efficiency
70
125
180
kHz
7
12
17
f
OSC
Oscillator Frequency
0.02
1.5
5.5
µA
50
90
I
CC
Quiescent Supply Current
350
650
µA
0.001
1
I
SHDN
Shutdown Supply Current
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
T
A
= 0°C to + 85°C
T
A
= +25°C
T
A
= 0°C to + 85°C
T
A
= +25°C
MAX1719/MAX1721
MAX1720
T
A
= +85°C
T
A
= +25°C
MAX1719/MAX1721
MAX1720
T
A
= 0°C to +85°C
T
A
= +25°C
T
A
= +85°C
T
A
= +25°C
MAX1719/MAX1721
MAX1720