MAX629 データシートの表示（PDF） - Maxim Integrated
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MAX629 Datasheet PDF : 12 Pages
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28V, Low-Power, High-Voltage,
Boost or Inverting DC-DC Converter
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +5V, CREF = 0.1µF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
REF Load Regulation
Line Regulation
Load Regulation
Thermal Shutdown Threshold
CONDITIONS
MIN
IREF = 0µA to 100µA, CREF = 0.47µF (Note 3)
Circuit of Figure 2, VOUT = 24V, VCC = 3V to 5.5V,
ILOAD = 5mA
Circuit of Figure 2, VOUT = 24V, VCC = 5V,
ILOAD = 0mA to 5mA
Die temperature
TYP
10
0.2
0.15
150
MAX
25
UNITS
mV
%/V
%
°C
Note 1: Specifications to -40°C are guaranteed by design and not production tested.
Note 2: The IC itself requires a supply voltage between +2.7V and +5.5V; however, the voltage that supplies power to the inductor
can vary from 0.8V to 28V, depending on circuit operating conditions.
Note 3: For reference currents less than 10µA, a 0.1µF reference-bypass capacitor is adequate.
__________________________________________Typical Operating Characteristics
(SHDN = VCC , CREF = 0.1µF, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
(VOUT = +24V)
100
VOUT = 24V
95 A: VIN = 12V, ISET = VCC
B: VIN = 12V, ISET = GND
90 C: VIN = 5V, ISET = VCC
A
B
85
C
80
D
75
E, F
70
65
60
0.1
D: VIN = 5V, ISET = GND
E: VIN = 3V, ISET = VCC
F: VIN = 3V, ISET = GND
1
10
100
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
(VOUT = +12V)
100
95
A
90
B
85
C
80
75
70
65
60
0.1
VOUT = 12V,
ISET = VCC or GND
A: VIN = 9V
B: VIN = 5V
C: VIN = 3V
1
10
100
LOAD CURRENT (mA)
MAXIMUM LOAD CURRENT vs.
INPUT VOLTAGE (VOUT = +24V, +12V)
300
A: VOUT = 12V,
ISET = VCC
A
250 B: VOUT = 12V,
ISET = GND
200 C: VOUT =24V,
ISET = VCC
D: VOUT = 24V,
C
150
ISET = GND
B
100
D
50
0
0
4
8
12
16
20
INPUT VOLTAGE (V)
EFFICIENCY vs. LOAD CURRENT
(VOUT = -18V)
100
95
90
85
A
80
B
C
75
D
70
65
60
55
50
0.1
A: VIN = 12V, ISET = VCC
B: VIN = 12V, ISET = GND
C: VIN = 5V, ISET = VCC or GND
D: VIN = 3V, ISET = VCC or GND
1
10
100
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
(VOUT = -12V)
100
95
90
85
80
A
75
B, C
D
70
65
60
55
50
0.1
A = VIN = 5V, ISET = VCC
B = VIN = 5V, ISET = GND
C = VIN = 3V, ISET = VCC
D = VIN = 3V, ISET = GND
1
10
100
LOAD CURRENT (mA)
MAXIMUM LOAD CURRENT vs. INPUT VOLTAGE
(VOUT = -18V, -12V)
90
A
80
70
60
B
50
A: VOUT = -12V, ISET = VCC
B: VOUT = -18V, ISET = VCC
40
C: VOUT = -12V, ISET = GND
30
D: VOUT = -18V, ISET = GND
C
20
D
10
0
0
4
8
12
16
20
INPUT VOLTAGE (V)
_______________________________________________________________________________________ 3
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