Step-up dc-dc converters in thin sot23-5 – Rainbow Electronics MAX1724 User Manual
Page 2
MAX1722/MAX1723/MAX1724
1.5µA I
Q
, Step-Up DC-DC Converters
in Thin SOT23-5
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
BATT
= 1.2V, V
OUT
= 3.3V (MAX1722/MAX1723), V
OUT
= V
OUT(NOM)
(MAX1724), SHDN = OUT, R
L
=
∞, T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
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.
OUT, SHDN, BATT, LX to GND ................................-0.3V to +6V
FB to GND ................................................-0.3V to (V
OUT
+ 0.3V)
OUT, LX Current.......................................................................1A
Continuous Power Dissipation (T
A
= +70°C)
5-Pin Thin SOT23 (derate 7.1mW/°C above +70°C) ...571mW
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
T
A
= +85°C
T
A
= +25°C
T
A
= 0°C to +85°C
T
A
= +25°C
T
A
= 0°C to +85°C
T
A
= +25°C
T
A
= 0°C to +85°C
T
A
= +25°C
T
A
= 0°C to +85°C
T
A
= +25°C
T
A
= 0°C to +85°C
T
A
= +25°C
MAX1723 (Note 2)
MAX1722/MAX1724
Shutdown Current into OUT
0.1
µA
Quiescent Current into OUT
1.5
3.6
µA
Quiescent Current into BATT
0.01
µA
MAX1723/MAX1724
(Notes 3, 4)
(Notes 3, 4)
MAX1722/MAX1724
(Note 4)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
2.633
2.767
Output Voltage
V
OUT
2.673
2.7
2.727
V
0.87
1.2
Minimum Startup Input Voltage
0.83
0.91
V
2.970
3.0
3.030
2.925
3.075
3.267
3.3
3.333
3.218
3.383
Operating Input Voltage
Minimum Input Voltage
0.8
V
V
IN
0.91
5.5
V
1.2
5.5
4.950
5.0
5.050
4.875
5.125
Output Voltage Range
V
OUT
2
5.5
V
Feedback Voltage
V
FB
1.223
1.235
1.247
V
1.210
1.260
Feedback Bias Current
I
FB
1.5
20
nA
2.2
N-Channel On-Resistance
R
DS(ON)
0.5
1.0
Ω
P-Channel On-Resistance
R
DS(ON)
1.0
2.0
Ω
N-Channel Switch Current Limit
I
LIM
400
500
600
mA
Switch Maximum On-Time
t
ON
3.5
5
6.5
µs
Synchronous Rectifier Zero-
Crossing Current
5
20
35
mA
CONDITIONS
MAX1724EZK50
MAX1724EZK27
T
A
= +25°C,
R
L
= 3k
Ω
MAX1724EZK30
MAX1722/MAX1723
MAX1722/MAX1723
MAX1724EZK33
MAX1722/MAX1723
MAX1722/MAX1724
V
OUT
forced to 3.3V
T
A
= +25°C
V
OUT
forced to 3.3V
V
OUT
forced to 3.3V
V
OUT
forced to 3.3V
MAX1722/MAX1724
MAX1723 (Note 2)
T
A
= +85°C
T
A
= +25°C
0.01
0.5
T
A
= +85°C
T
A
= +25°C
0.001
0.5