MAX742 Maxim, MAX742 Datasheet - Page 4

• Manufacturer Part Number: MAX742
• Description: Switch-Mode Regulator with +5V to 12V or 15V Dual Output
• Manufacturer: Maxim

Switch-Mode Regulator with
+5V to ±12V or ±15V Dual Output
(Circuit of Figure 2, V+ = 5V, T
4
__________________________________________Typical Operating Characteristics
_______________________________________________________________________________________
90
80
70
60
50
25
20
15
10
5
0
0
UNDERVOLTAGE LOCKOUT HYSTERESIS
±15V MODE,
200kHz MODE
EFFICIENCY vs. LOAD CURRENT,
CIRCUIT OF FIGURE 3,
INDUCTORS = GOWANDA 121-AT2502
Q2 = TWO IRF9Z30 IN PARALLEL
±15V MODE
±200
1
22W CIRCUIT, ±15V MODE
1200
1100
1000
900
800
700
600
500
400
300
200
100
SUPPLY VOLTAGE (V)
LOAD CURRENT (mA)
±400 ±600
2
0
LOCKOUT
ENABLED
(MPP CORE),
3
PEAK INDUCTOR CURRENT vs.
200kHz
50
MEASURED AT LX-,
±15V MODE
±800
LOAD CURRENT (mA)
4
A
LOAD CURRENT
100
= +25°C, unless otherwise noted.)
100kHz
±1000
5
100kHz
150
6
200kHz
200
-5.0
-4.5
-4.0
-3.5
-3.0
-2.5
90
80
70
60
50
0
0
CHARGE-PUMP LOAD REGULATION
1
CHARGE-PUMP LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT,
INDUCTORS = GOWANDA 050-AT1003
MEASURED AT POINT A
±50
2
6W CIRCUIT, ±15V MODE
LOAD CURRENT (mA)
3
±100
4
(MPP CORE)
5
V+ = 4.5V
6
±150
7
V+ = 5V
8
200kHz
±200
100kHz
9
200
150
100
50
10
±250
0
CURRENT-LIMIT THRESHOLD vs.
SOFT-START VOLTAGE (V)
SOFT-START VOLTAGE
90
80
70
60
50
6
5
4
3
2
1
1
0
0
PDRV FORCED TO -4V
PUMP DISCONNECTED
EFFICIENCY vs. LOAD CURRENT,
INDUCTORS = GOWANDA 050-AT1003
±75
PDRV CURRENT vs. C
6W CIRCUIT, ±12V MODE
CAPACITANCE AT EXT- (nF)
1
2
LOAD CURRENT (mA)
±150
(MPP CORE)
2
100kHz
±225
200kHz
3
200kHz
EXT-
3
±300
100kHz
4