MAX1856 Maxim, MAX1856 Datasheet - Page 6

• Manufacturer Part Number: MAX1856
• Description: Wide Input Range / Synchronizable / PWM SLIC Power Supply
• Manufacturer: Maxim

Wide Input Range, Synchronizable,
PWM SLIC Power Supply
(Circuit of Figure 1, V
6
1.260
1.255
1.250
1.240
1.245
350
310
270
230
190
150
_______________________________________________________________________________________
-40
0
R
OSC
= 100kΩ
-15
100
vs. REFERENCE CURRENT
REFERENCE VOLTAGE
REFERENCE CURRENT (µA)
vs. TEMPERATURE
SUPPLY CURRENT
R
OSC
TEMPERATURE (°C)
200
10
= 200kΩ
CC
CURRENT INTO V
600
500
400
300
200
100
= V
0
-40
R
300
35
OSC
SYNC/SHDN
R
= 500kΩ
OSC
400
-15
60
= 100kΩ
SWITCHING FREQUENCY
CC
vs. TEMPERATURE
PIN
TEMPERATURE (°C)
= 12V, V
85
500
10
R
OSC
R
= 200kΩ
35
OSC
1.260
1.255
1.250
1.240
1.245
OUT1
Typical Operating Characteristics (continued)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
= 500kΩ
0
-40
0
60
= -24V, V
NO LOAD
5
-15
85
SHUTDOWN CURRENT
REFERENCE VOLTAGE
vs. INPUT VOLTAGE
vs. TEMPERATURE
INPUT VOLTAGE (V)
TEMPERATURE (°C)
10
OUT2
10
15
CURRENT INTO V
= -72V, R
SYNC/SHDN = GND
35
20
70
60
50
40
30
20
10
R
0
OSC
0.1
60
OSC
= 500kΩ
25
CC
PIN
= 200kΩ, unless otherwise noted.)
30
85
EXT RISE/FALL TIME
vs. CAPACITANCE
t
FALL
CAPACITANCE (nF)
, V
t
IN
1000
FALL
250
200
150
100
100
= 3.3V
50
1
0
, V
t
100
RISE
0
IN
, V
= 5V
SWITCHING FREQUENCY vs. R
t
RISE
IN
= 3.3V
, V
LDO DROPOUT VOLTAGE
2
IN
= 5V
vs. LOAD CURRENT
4
R
10
I
LDO
OSC
(mA)
(kΩ)
V
IN
6
= 3.3V
V
IN
8
= 5V
OSC
1000
10