MAX1674-MAX1676 Maxim, MAX1674-MAX1676 Datasheet - Page 6

• Manufacturer Part Number: MAX1674-MAX1676
• Description: High-Efficiency / Low-Supply-Current / Compact / Step-Up DC-DC Converters
• Manufacturer: Maxim

High-Efficiency, Low-Supply-Current,
Compact, Step-Up DC-DC Converters
(L = 22µH, C
6
Dual-Mode is a trademark of Maxim Integrated Products.
I
100mA
LOAD
_______________________________________________________________________________________
MAX1674
MAX1675
LINE-TRANSIENT RESPONSE
—
—
1
2
3
4
5
6
7
8
IN
10 s/div
= 47µF, C
PIN
OUT
MAX1674 TOC15
MAX1676
= 47µF 0.1µF, C
10
1
2
3
4
5
6
7
8
9
V
2V TO 3V
1V/div
V
AC COUPLED
100mV/div
IN
OUT
REF
Typical Operating Characteristics (continued)
CLSEL
NAME
SHDN
LOAD-TRANSIENT RESPONSE
BATT
= 0.1µF, T
GND
LBO
OUT
REF
LBI
FB
LX
5 s/div
A
Dual-Mode™ Feedback Input. Connect to GND for +5.0V output.
Connect to OUT for +3.3V output. Use a resistor network to set the
output voltage from +2.0V to +5.5V.
Low-Battery Comparator Input. Internally set to trip at +1.30V.
Open-Drain Low-Battery Comparator Output. Output is low when
V
Current-Limit Select Input. CLSEL = OUT sets the current limit to 1A.
CLSEL = GND sets the current limit to 0.5A.
1.3V Reference Voltage. Bypass with a 0.1µF capacitor.
Shutdown Input. High = operating, low = shutdown.
Battery Input and Damping Switch Connection. If damping switch is
unused, leave BATT unconnected.
Ground
N-Channel and P-Channel Power MOSFET Drain
Power Output. OUT provides bootstrap power to the IC.
= +25°C, unless otherwise noted.)
LBI
is <1.3V. LBO is high impedance during shutdown.
V
V
IN
OUT
= 2.4V
MAX1674 TOC16
= 3.3V
I
200mA/div
V
50mV/div
AC
COUPLED
OUT
OUT
FUNCTION
EXITING SHUTDOWN
Pin Description
500 s/div
MAX1674 TOC17
V
2V/div
V
2V/div
OUT
SHDN