1.5µA I , Step-Up DC-DC Converters
Q
in Thin SOT23-5
ELECTRICAL CHARACTERISTICS (continued)
(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
MIN
TYP
0.001
0.01
400
500
2
MAX
UNITS
T
A
T
A
= +25°C
= +85°C
0.5
Shutdown Current into BATT
MAX1724 (Note 4)
µA
V
IL
MAX1723/MAX1724
MAX1723/MAX1724
75
mV
nA
SHDN Voltage Threshold
SHDN Input Bias Current
V
IH
800
100
T
T
= +25°C
= +85°C
MAX1723/MAX1724,
A
V
= 5.5V
SHDN
7
A
ELECTRICAL CHARACTERISTICS
(V
= 1.2V, V
= 3.3V (MAX1722/MAX1723), V
= V
(MAX1724), SHDN = OUT, R = ∞, T = -40°C to +85°C,
OUT(NOM) L A
BATT
OUT
OUT
unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
2.767
3.075
3.383
5.125
5.5
UNITS
MAX1724EZK27
MAX1724EZK30
MAX1724EZK33
MAX1724EZK50
MAX1722/MAX1723
MAX1722/MAX1723
2.633
2.925
3.218
4.875
2
Output Voltage
V
V
V
OUT
Output Voltage Range
V
V
OUT
Feedback Voltage
V
1.200
1.270
1.0
FB
R
R
N-Channel On-Resistance
P-Channel On-Resistance
N-Channel Switch Current Limit
Switch Maximum On-Time
V
V
V
forced to 3.3V
forced to 3.3V
forced to 3.3V
Ω
DS(ON)
DS(ON)
OUT
OUT
OUT
2.0
Ω
I
400
3.5
620
mA
µs
LIM
t
6.5
ON
Synchronous Rectifier Zero-
Crossing Current
V
forced to 3.3V
5
35
mA
µA
OUT
Quiescent Current into OUT
(Notes 3,4)
3.6
V
MAX1723/MAX1724
MAX1723/MAX1724
75
IL
SHDN Voltage Threshold
mV
V
800
IH
Note 1: Limits are 100% production tested at T = +25°C. Limits over the operating temperature range are guaranteed by design.
A
Note 2: Guaranteed with the addition of a Schottky MBR0520L external diode between LX and OUT when using the MAX1723
with only one cell, and assumes a 0.3V voltage drop across the Schottky diode (see Figure 3).
Note 3: Supply current is measured with an ammeter between the output and OUT pin. This current correlates directly with actual
battery supply current, but is reduced in value according to the step-up ratio and efficiency.
✕
Note 4: V
forced to the following conditions to inhibit switching: V
= 1.05
V
(MAX1724), V
= 3.465V
OUT
OUT
OUT
OUT(NOM)
(MAX1722/MAX1723).
_______________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
