Step-up dc-dc converters in thin sot23-5, Pin description, Typical operating characteristics (continued) – Rainbow Electronics MAX1724 User Manual
Page 5
MAX1722/MAX1723/MAX1724
1.5µA I
Q
, Step-Up DC-DC Converters
in Thin SOT23-5
_______________________________________________________________________________________
5
Pin Description
1ms/div
V
SHDN
1V/div
5V
0
0
2V
SHUTDOWN RESPONSE
MAX1722 toc10
V
IN
= 3.3V, V
OUT
= 5.0V, R
OUT
= 100
Ω
V
OUT
2V/div
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
-40
-15
10
35
60
85
SHUTDOWN INPUT THRESHOLD
vs. TEMPERATURE
MAX1722 toc11
TEMPERATURE (
°C)
SHUTDOWN THRESHOLD (mV)
RISING EDGE
FALLING EDGE
Typical Operating Characteristics (continued)
(Figure 3 (MAX1723), Figure 7 (MAX1722), Figure 8 (MAX1724), V
BATT
= V
IN
= 1.5V, L = 10µH, C
IN
= 10µF, C
OUT
= 10µF, T
A
= +25°C,
unless otherwise noted.)
MAX1724
MAX1722
MAX1723
OUT
LX
FB
GND
SHDN
BATT
NAME
4
5
—
2
3
1
Power Output. OUT also provides bootstrap power to the IC.
4
4
Internal N-channel MOSFET Switch Drain and P-Channel Synchronous
Rectifier Drain
5
5
Feedback Input to Set Output Voltage. Use a resistor-divider network to
adjust the output voltage. See Setting the Output Voltage section.
3
3
Ground
2
2
PIN
Shutdown Input. Drive high for normal operation. Drive low for shutdown.
1
—
Battery Input and Damping Switch Connection
—
1
FUNCTION
200
µs/div
A
A: V
OUT
, 50mV/div
B: I
OUT
, 20mA/div
B
LOAD-TRANSIENT RESPONSE
MAX1722 toc09
3.3V
50mA
0