MAX866 Maxim, MAX866 Datasheet - Page 6

• Manufacturer Part Number: MAX866
• Description: 3.3V/5V or Adjustable-Output / Single-Cell DC-DC Converters
• Manufacturer: Maxim

3.3V/5V or Adjustable-Output,
Single-Cell DC-DC Converters
(Circuits of Figure 2, T
6
______________________________________________________________Pin Description
____________________________Typical Operating Characteristics (continued)
MAX866
_______________________________________________________________________________________
—
30
25
20
15
10
1
2
3
4
5
6
7
8
-60
OUTPUT CURRENT CAPABILITY
3.3V MODE
-40
PIN
-20
MAX867
vs. TEMPERATURE
TEMPERATURE (°C)
—
1
2
3
4
5
6
7
8
0
A
20
= +25°C, unless otherwise noted.)
V
V
IN
IN
= 0.9V
= 1.2V
40
NAME
–
S
—
GND
OUT
LBO
REF
H
3/
LBI
60
—
FB
LX
D
–
5
—
–
N
–
80
100
Shutdown Input. When low, the entire circuit is off and V
forward voltage drop of the external Schottky rectifier.
Selects the output voltage; connect to GND for 5V output, and to OUT for 3.3V output.
Feedback Input for adjustable-output operation. Connect to an external resistor voltage
divider between OUT and GND.
1.25V Reference Voltage Output. Bypass with 0.22µF to GND (0.1µF if there is no external
reference load). Maximum load capability is 250µA source, 20µA sink.
Low-Battery Output. An open-drain N-channel MOSFET sinks current when the voltage at
LBI drops below 1.25V.
Low-Battery Input. When the voltage on LBI drops below 1.25V, LBO sinks current.
If not used, connect to V
Connect OUT to the regulator output. OUT provides bootstrap power to the IC.
Power Ground. Must be low impedance; solder directly to ground plane.
N-Channel Power-MOSFET Drain
30
28
26
24
22
20
-60
V
OUT
-40
QUIESCENT SUPPLY CURRENT
= 3.47V
-20
vs. TEMPERATURE
TEMPERATURE (°C)
0
IN
.
20
40
I
OUT
60
FUNCTION
80
100
1.255
1.250
1.245
OUT
-60
= V
-40
IN
REFERENCE VOLTAGE
-20
vs. TEMPERATURE
TEMPERATURE (°C)
- V
D,
0
where V
20
40
D
60
I
REF
is the
= 0A
80
100