1.5µA I , Step-Up DC-DC Converters
Q
in Thin SOT23-5
ABSꢀLUTE MAXIMUM RATINGS
OUT, SHDN, BATT, LX to GND ................................-0.3V to +6V
FB to GND ................................................-0.3V to (V + 0.3V)
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................ +300°C
OUT
OUT, LX Current.......................................................................1A
Continuous Power Dissipation (T = +70°C)
A
5-Pin Thin SOT23 (derate 7.1mW/°C above +70°C)...571mW
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
= 1.2V, V
= 3.3V (MAX1722/MAX1723), V
= V
(MAX1724), SHDN = OUT, R = ∞, T = 0°C to +85°C,
OUT(NOM) L A
BATT
OUT
OUT
unless otherwise noted. Typical values are at T = +25°C.) (Note 1)
A
PARAMETER
SYMBꢀL
CꢀNDITIꢀNS
MAX1722/MAX1724
MIN
TYP
MAX
UNITS
Minimum Input Voltage
0.8
V
MAX1722/MAX1724
0.91
1.2
5.5
5.5
Operating Input Voltage
V
T
= +25°C
V
V
IN
A
MAX1723 (Note 2)
MAX1722/MAX1724
MAX1723 (Note 2)
0.83
0.87
2.7
0.91
1.2
T
A
= +25°C,
Minimum Startup Input Voltage
R = 3kΩ
L
T
A
T
A
T
A
T
A
T
A
T
A
T
A
T
A
= +25°C
2.673
2.633
2.970
2.925
3.267
3.218
4.950
4.875
2
2.727
2.767
3.030
3.075
3.333
3.383
5.050
5.125
5.5
MAX1724EZK27
MAX1724EZK30
MAX1724EZK33
= 0°C to +85°C
= +25°C
3.0
3.3
5.0
= 0°C to +85°C
= +25°C
Output Voltage
V
V
V
OUT
= 0°C to +85°C
= +25°C
MAX1724EZK50
= 0°C to +85°C
Output Voltage Range
Feedback Voltage
MAX1722/MAX1723
MAX1722/MAX1723
V
V
OUT
T
A
T
A
T
A
T
A
= +25°C
1.223
1.210
1.235
1.247
1.260
20
V
FB
= 0°C to +85°C
= +25°C
1.5
2.2
0.5
1.0
500
5
Feedback Bias Current
I
FB
MAX1722/MAX1723
nA
= +85°C
N-Channel On-Resistance
P-Channel On-Resistance
N-Channel Switch Current Limit
Switch Maximum On-Time
R
R
V
V
V
forced to 3.3V
forced to 3.3V
forced to 3.3V
1.0
2.0
600
6.5
Ω
Ω
DS(ON)
OUT
OUT
OUT
DS(ON)
I
400
3.5
mA
µs
LIM
t
ON
Synchronous Rectifier Zero-
Crossing Current
V
forced to 3.3V
5
20
35
mA
µA
µA
OUT
Quiescent Current into OUT
Shutdown Current into OUT
(Notes 3, 4)
1.5
0.01
0.1
3.6
0.5
T
A
T
A
T
A
T
A
= +25°C
= +85°C
= +25°C
= +85°C
MAX1723/MAX1724
(Notes 3, 4)
0.001
0.01
0.5
MAX1722/MAX1724
(Note 4)
Quiescent Current into BATT
µA
2
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
