Step-up dc-dc converters in thin sot23-5, Electrical characteristics (continued), Electrical characteristics – Rainbow Electronics MAX1724 User Manual
Page 3
MAX1722/MAX1723/MAX1724
1.5µA I
Q
, Step-Up DC-DC Converters
in Thin SOT23-5
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(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)
Note 1: Limits are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by design.
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
OUT
forced to the following conditions to inhibit switching: V
OUT
= 1.05
✕
V
OUT(NOM)
(MAX1724), V
OUT
= 3.465V
(MAX1722/MAX1723).
V
IL
MAX1723/MAX1724
T
A
= +85°C
T
A
= +25°C
T
A
= +85°C
T
A
= +25°C
0.001
0.5
SHDN Voltage Threshold
V
IH
500
800
mV
Shutdown Current into BATT
0.01
µA
SHDN Input Bias Current
7
nA
MAX1724 (Note 4)
MAX1723/MAX1724,
V
SHDN
= 5.5V
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
CONDITIONS
MAX1723/MAX1724
75
400
2
100
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX1724EZK27
2.633
2.767
MAX1724EZK30
2.925
3.075
MAX1724EZK33
3.218
3.383
O utp ut V ol tag e
V
OUT
MAX1724EZK50
4.875
5.125
V
O utp ut V ol tag e Rang e
V
OUT
MAX1722/MAX1723
2
5.5
V
Feedback Voltage
V
FB
MAX1722/MAX1723
1.200
1.270
V
N-Channel On-Resistance
R
DS(ON)
V
OUT
forced to 3.3V
1.0
Ω
P-Channel On-Resistance
R
DS(ON)
V
OUT
forced to 3.3V
2.0
Ω
N-Channel Switch Current Limit
I
LIM
V
OUT
forced to 3.3V
400
620
mA
Switch Maximum On-Time
t
ON
3.5
6.5
µs
Synchronous Rectifier Zero-
Crossing Current
V
OUT
forced to 3.3V
5
35
mA
Quiescent Current into OUT
(Notes 3,4)
3.6
µA
V
IL
MAX1723/MAX1724
75
SHDN Voltage Threshold
V
IH
MAX1723/MAX1724
800
mV
ELECTRICAL CHARACTERISTICS
(V
BATT
= 1.2V, V
OUT
= 3.3V (MAX1722/MAX1723), V
OUT
= V
OUT(NOM)
(MAX1724), SHDN = OUT, R
L
=
∞, T
A
= -40°C to +85°C,
unless otherwise noted.) (Note 1)