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MAX774CPA View Datasheet(PDF) - Maxim Integrated

Part NameMAX774CPA MaximIC
Maxim Integrated MaximIC
Description-15V or adjustable, high-efficiency, low IQ inverting DC-DC controller
MAX774CPA Datasheet PDF : 16 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
-5V/-12V/-15V or Adjustable,
High-Efficiency, Low IQ Inverting DC-DC Controllers
__________________________________________Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
MAX774
EFFICIENCY vs. LOAD CURRENT
VOUT = -5V (BOOTSTRAPPED)
90
VIN = 5V
80
VIN = 3V
VIN = 15V
70
MAX774
EFFICIENCY vs. LOAD CURRENT
VOUT = -5V (NON-BOOTSTRAPPED)
90
VIN = 5V
80
VIN = 4V
70
VIN = 15V
MAX774
EFFICIENCY vs. TEMPERATURE
90
ILOAD = 100mA
80
ILOAD = 600mA
ILOAD = 1A
70
60
50
1
10
100
1000
LOAD CURRENT (mA)
MAX776
EFFICIENCY vs. LOAD CURRENT
VOUT = -15V (BOOTSTRAPPED)
90
VIN = 6V
80
VIN = 5V
VIN = 4V
70
VIN = 3V
60
50
1
10
100
1000
LOAD CURRENT (mA)
MAX776
EFFICIENCY vs. LOAD CURRENT
VOUT = -15V (NON-BOOTSTRAPPED)
90
80
VIN = 5V
VIN = 15V
VIN = 6V
70
VIN = 4V
60
VIN = 5V
BOOTSTRAPPED
50
-40 -20 0 20 40 60
TEMPERATURE (°C)
80 100
MAX775
EFFICIENCY vs. OUTPUT CURRENT
VOUT = -12V (BOOTSTRAPPED)
90
VIN = 5V
80
VIN = 4V
VIN = 8V
70
60
60
60
50
1
10
100
1000
LOAD CURRENT (mA)
MAX774/MAX775/MAX776
EFFICIENCY vs. LOAD CURRENT
VOUT = -24V (NON-BOOTSTRAPPED)
90
VIN = 6V
80
VIN = 4V
70
VIN = 5V
60
50
1
10
100
1000
LOAD CURRENT (mA)
50
1
10
100
1000
LOAD CURRENT (mA)
MAX774/MAX775/MAX776
EFFICIENCY vs. LOAD CURRENT
VOUT = -24V OUTPUT (ZENER CONNECTION)
90
VIN = 6V
VIN = 5V
80
VIN = 4V
70
60
50
1
10
100
1000
LOAD CURRENT (mA)
50
1
10
100
1000
OUTPUT CURRENT (mA)
MAX774
EFFICIENCY vs. INPUT VOLTAGE
VOUT = -5V AT 100mA
88
86
BOOTSTRAPPED
84
82
80
NON-BOOTSTRAPPED
78
76
VOUT = -5V AT 100mA
74
2 4 6 8 10 12 14 16
INPUT VOLTAGE (V)
4 _______________________________________________________________________________________
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The MAX774/MAX775/MAX776 inverting switching regulators deliver high efficiency over three decades of load current.

A unique current-limited, pulse frequency modulated (PFM) control scheme provides the benefits of pulse-width modulation (high efficiency with heavy loads), while using less than 100µA of supply current (vs. 2mA to 10mA for PWM converters).

The result is high efficiency over a wide range of loads.

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