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MAX771ESA+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
0
1
2
3
4
-75
-50 -25 0
25 50 75 100 125
SUPPLY CURRENT vs. TEMPERATURE
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
V
OUT
= 12V, V
IN
= 5V
CIRCUIT OF FIGURE 2b
BOOTSTRAPPED MODE
ENTIRE
CIRCUIT
SCHOTTKY DIODE
LEAKAGE EXCLUDED
MAX770–3-07
0
0.2
0.4
0.6
0.8
2
4
6 8
10
12
SUPPLY CURRENT vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
V
OUT
= 12V
NON-BOOTSTRAPPED
CIRCUIT OF FIGURE 2c
BOOTSTRAPPED
CIRCUIT OF
FIGURE 2b
MAX770–3-08
0
100
150
200
250
50
2
4
6 8
10
12
EXT RISE/FALL TIME vs. SUPPLY VOLTAGE
V+ (V)
EXT RISE/FALL TIME (ns)
C
EXT
= 2200pF
C
EXT
= 1000pF
C
EXT
= 446pF
C
EXT
= 100pF
MAX770–3-09
100
50
0.001 0.01 0.1 1
MAX772
EFFICIENCY vs. OUTPUT CURRENT
(BOOTSTRAPPED)
60
OUTPUT CURRENT (A)
EFFICIENCY (%)
70
80
90
V
OUT
= 15V, CIRCUIT OF FIGURE 2b
MAX772 SUBSTITUTED FOR MAX771
V
IN
= 12V
V
IN
= 9V
V
IN
= 6V
V
IN
= 5V
V
IN
= 3V
MAX770–3-03
50
60
70
80
90
100
0.001 0.01 1
MAX771
EFFICIENCY vs. OUTPUT CURRENT
(BOOTSTRAPPED)
OUTPUT CURRENT (A)
EFFICIENCY (%)
0.1
V
IN
= 6V
V
IN
= 5V
V
IN
= 3V
V
IN
= 9V
V
OUT
= 12V
CIRCUIT OF
FIGURE 2b
MAX770–3-02
100
50
0.001 0.01 0.1 1
MAX770
EFFICIENCY vs. OUTPUT CURRENT
(BOOTSTRAPPED)
60
OUTPUT CURRENT (A)
EFFICIENCY (%)
70
80
90
V
IN
= 3V
V
IN
= 3.5V
V
OUT
= 5V
CIRCUIT OF
FIGURE 2a
V
IN
= 4V
MAX770–3-01
MAX770–MAX773
5V/12V/15V or Adjustable, High-Efficiency,
Low I
Q
, Step-Up DC-DC Controllers
4
_______________________________________________________________________________________
__________________________________________Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
70
80
90
100
0.001
0.01
0.1
10
1
MAX771
EFFICIENCY vs. OUTPUT CURRENT
(NON-BOOTSTRAPPED)
OUTPUT CURRENT (A)
EFFICIENCY (%)
V
IN
= 9V
V
IN
= 6V
V
IN
= 5V
V
OUT
= 12V
CIRCUIT OF
FIGURE 2c
MAX770–3-04
0
100
200
300
400
500
600
700
1.0
MAX770
LOAD CURRENT vs.
MINIMUM START-UP INPUT VOLTAGE
MINIMUM START-UP INPUT VOLTAGE (V)
LOAD CURRENT (mA)
3.01.5 2.5 3.52.0
ABOVE 3.4V,
THE CIRCUIT
STARTS UP
UNDER
MAXIMUM
LOAD
CONDITIONS
V
OUT
= 5V
CIRCUIT OF
FIGURE 2a
MAX770–3-05
0
100
200
300
400
500
2.0
MAX771
LOAD CURRENT vs.
MINIMUM START-UP INPUT VOLTAGE
MINIMUM START-UP INPUT VOLTAGE (V)
LOAD CURRENT (mA)
4.0
2.5
3.5
3.0
ABOVE 3.5V
THE CIRCUIT
STARTS UP
UNDER
MAXIMUM
LOAD
CONDITIONS
V
OUT
= 12V
CIRCUIT OF
FIGURE 2b
MAX770–3-06
MAX770–MAX773
5V/12V/15V or Adjustable, High-Efficiency,
Low I
Q
, Step-Up DC-DC Controllers
_______________________________________________________________________________________
5
250
0
-60 -20 60 140
REFERENCE OUTPUT RESISTANCE vs.
TEMPERATURE
50
MAX770–3-10
TEMPERATURE (°C)
REFERENCE OUTPUT RESISTANCE (Ω)
20 100
150
-40 0 8040 120
100
200
100µA
50µA
10µA
1.502
-60 -20 60 140
REFERENCE vs. TEMPERATURE
MAX770–3-11
TEMPERATURE (°C)
REFERENCE (V)
20 100-40 0 8040 120
1.500
1.498
1.496
1.494
1.492
1.504
1.506
15.5
16.0
16.5
-60
-30 0 30 60
90
120 150
MAXIMUM SWITCH ON-TIME vs.
TEMPERATURE
TEMPERATURE (°C)
t
ON(MAX) (µs)
MAX770–3-13
2.20
2.25
2.30
-60
-30 0 30 60
90
120 150
MINIMUM SWITCH OFF-TIME vs.
TEMPERATURE
TEMPERATURE (°C)
t
OFF(MIN) (µs)
MAX770–3-14
6.0
7.0
8.0
-60
-30 0 30 60
90
120 150
MAXIMUM SWITCH ON-TIME/
MINIMUM SWITCH OFF-TIME RATIO
vs. TEMPERATURE
TEMPERATURE (°C)
t
ON(MAX)/
t
OFF(MIN) RATIO
MAX770–3-15
7.5
6.5
____________________________Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
MAX770–MAX773
5V/12V/15V or Adjustable, High-Efficiency,
Low I
Q
, Step-Up DC-DC Controllers
6
_______________________________________________________________________________________
V
IN
= 2.9V, I
OUT
= 0.9A
A: EXT VOLTAGE, 5V/div
B: INDUCTOR CURRENT 1A/div
C: V
OUT
RIPPLE 100mV/div, AC-COUPLED
MAX770
HEAVY-LOAD SWITCHNG WAVEFORMS
20
µ
s/div
V
OUT
0 A
I
LIM
I
LIM
2
B
C
0
V+ = 3V, I
OUT
= 165mA
A: EXT VOLTAGE, 5V/div
B: INDUCTOR CURRENT, 1A/div
C: V
OUT
RIPPLE 100mV/div, AC-COUPLED
MAX770
LIGHT-LOAD SWITCHING WAVEFORMS
20
µ
s/div
0
B
A
C
I
LIM
2
I
OUT
= 0.7A
A: V
IN
, 2.7V TO 4.5V, 2V/div
B: V
OUT
RIPPLE, 100mV/div, AC-COUPLED
MAX770
LINE-TRANSIENT RESPONSE
A
B
4.5V
2.7V
0
2ms/div
V
IN
= 3V
A: LOAD CURRENT 0.5A/div (0A to 1A)
B: V
OUT
RIPPLE, 100mV/div, AC-COUPLED
MAX770
LOAD-TRANSIENT RESPONSE
2ms/div
A
B
0
____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 2a, T
A
= +25°C, unless otherwise noted.)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

MAX771ESA+T

Mfr. #:
Buy MAX771ESA+T
Manufacturer:
Maxim Integrated
Description:
Switching Controllers 5/12/15/AdjV Step Up DC/DC Controller
Lifecycle:
New from this manufacturer.
Delivery:
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