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MAX1708EEE+

P1-P3P4-P6P7-P9P10-P12P13-P14
Note 1: Output voltage is specified at 0.5A switch current I
SW
, which is equivalent to approximately 0.5A
✕
(V
IN
/ V
OUT
) of load cur-
rent.
Note 2: Load regulation is measured by forcing specified switch current and straight-line calculation of change in output voltage in
external feedback mode. Note that the equivalent load current is approximately I
SW
✕
(V
IN
/ V
OUT
).
Note 3: Until undervoltage lockout is reached, the device remains in startup mode. Do not apply full load until this voltage is
reached.
Note 4: Startup is tested with Figure 1’s circuit. Output current is measured when both the input and output voltages are applied.
Note 5: Minimum operating voltage. The MAX1708 is bootstrapped and will operate down to a 0.7V input once started.
Note 6: Supply current is measured from the output voltage (3.3V) to the OUT pin. This correlates directly with actual input supply
current but is reduced in value according to the step-up ratio and efficiency.
Note 7: ONA and ONB inputs have approximately 0.15V hysteresis.
Note 8: Guaranteed by design, not production tested.
Note 9: Specifications to -40°C are guaranteed by design, not production tested.
MAX1708
High-Frequency, High-Power, Low-Noise,
Step-Up DC-DC Converter
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
OUT
= V
CLK
= 3.6V, ONA = ONB = FB = GND, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 9)
PARAMETER CONDITIONS MIN MAX UNITS
ONA, ONB, 3.3/5, 1.2V < V
OUT
< 5.5V 0.2
V
OUT
Input Low Level (Note 7)
CLK, 2.7V < V
OUT
< 5.5V 0.2
V
OUT
V
ONA, ONB, 3.3/5, 1.2V < V
OUT
< 5.5V 0.8
V
OUT
Input High Level
CLK, 2.7V < V
OUT
< 5.5V 0.8
V
OUT
V
Logic Input Current V
ONA
, V
ONB
, V
CLK
, V
3. 3/5
= 0V, 5.5V -1 1 μA
Internal Oscillator Frequency 500 700 kHz
Maximum Duty Cycle 80 95 %
External Clock Frequency Range 350 1000 kHz
CLK Pulse Width (Note 8) 100 ns
CLK Rise/Fall Time (Note 8) 50 Ns
MAX1708
High-Frequency, High-Power, Low-Noise,
Step-Up DC-DC Converter
_______________________________________________________________________________________
5
Typical Operating Characteristics
(Circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
100
0
0.1 1 1000 10,000
EFFICIENCY vs. OUTPUT CURRENT
MAX1708 toc01a
OUTPUT CURRENT (mA)
EFFICIENCY (%)
10 100
20
40
60
80
V
IN
= 3.3V
V
IN
= 2.5V
V
OUT
= 5V
2.0
-2.0
0.1 1 1000 10,000
LOAD REGULATION
(V
IN
= 3.3V, V
OUT
= 5V)
-1.5
0.5
1.0
1.5
MAX1708 toc03a
OUTPUT CURRENT (mA)
V
OUT
REGULATION (%)
10 100
-1.0
-0.5
0
PLOT NORMALIZED TO I
OUT
= 500mA
2.0
-2.0
0.1 1 1000 10,000
LOAD REGULATION
(V
IN
= 2.5V, V
OUT
= 3.3V)
-1.5
0.5
1.0
1.5
MAX1708 toc03b
OUTPUT CURRENT (mA)
V
OUT
REGULATION (%)
10 100
-1.0
-0.5
0
PLOT NORMALIZED TO I
OUT
= 500mA
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
1.50 1.75 2.00 2.25 2.50 2.75 3.00
LINE REGULATION
(V
OUT
= 3.3V)
MAX1708 toc04b
INPUT VOLTAGE (V)
V
OUT
REGULATION (%)
PLOT NORMALIZED TO V
IN
= 2.5V
I
OUT
= 500mA
I
OUT
= 1A
0
20
10
40
30
60
50
70
0231 456
NO LOAD INPUT CURRENT
vs. INPUT VOLTAGE
MAX1708 toc05b
INPUT VOLTAGE (V)
INPUT CURRENT (mA)
V
OUT
= 3.3V, V
IN
DECREASING
V
OUT
= 5V, V
IN
DECREASING
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
2.00 2.502.25 2.75 3.00 3.25 3.50 3.75 4.00
LINE REGULATION
(V
OUT
= 5V)
MAX1708 toc04a
INPUT VOLTAGE (V)
V
OUT
REGULATION (%)
PLOT NORMALIZED TO V
IN
= 3.3V
I
OUT
= 500mA
I
OUT
= 1A
100
0
0.1 1 1000 10,000
EFFICIENCY vs. OUTPUT CURRENT
MAX1708 toc01b
OUTPUT CURRENT (mA)
EFFICIENCY (%)
10 100
20
40
60
80
V
IN
= 1.2V
V
IN
= 2.5V
V
OUT
= 3.3V
86
87
88
89
90
EFFICIENCY vs. SWITCHING FREQUENCY
MAX1708 toc02
SWITCHING FREQUENCY (kHz)
EFFICIENCY (%)
350 650 750450 550 850 950
V
IN
= 3.3V, V
OUT
= 5V, I
OUT
=1A
MAX1708
High-Frequency, High-Power, Low-Noise,
Step-Up DC-DC Converter
6 _______________________________________________________________________________________
1000 10,000
0
0.2
0.4
0.6
0.8
1.2
1.0
1.6
1.4
1.8
1 10 100
STARTUP VOLTAGE vs. LOAD CURRENT
(V
OUT
= 5V)
MAX1708 toc06a
LOAD CURRENT (mA)
STARTUP VOLTAGE (V)
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
2.5
2.0
1.5
1.0
0.5
0
1 100 100010 10,000
STARTUP VOLTAGE vs. LOAD CURRENT
(V
OUT
= 3.3V)
MAX1708 toc06b
LOAD CURRENT
(
mA
)
STARTUP VOLTAGE (V)
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
2
1
0
-1
-2
-40 10-15 35 60 85
SWITCHING FREQUENCY
vs. TEMPERATURE
MAX1708 toc07
TEMPERATURE (
°
C)
FREQUENCY CHANGE (%)
V
OUT
= 3.3V
PLOT NORMALIZED TO 25°C
4000
0
0.1 1 10
NOISE vs. FREQUENCY
MAX1708 toc08
FREQUENCY (MHz)
NOISE (μV)
500
1000
2000
1500
3000
3500
2500
RESOLUTION = 1kHz
500 250200150100 300
SWITCH CURRENT LIMIT
vs. SS/LIM RESISTANCE
MAX1708 toc09
SS/LIM RESISTANCE (kΩ)
SWITCH CURRENT LIMIT (A)
1
2
0
4
5
3
6.0
5.5
5.0
4.5
4.0
-40 10-15 35 60 85
SWITCH CURRENT LIMIT
vs. TEMPERATURE
MAX1708 toc10
TEMPERATURE (
°
C)
SWITCH CURRENT LIMIT (A)
V
IN
= 3.3V, V
OUT
= 5V
1μs/div
HEAVY SWITCHING WAVEFORM
V
OUT
AC-COUPLED
50mV/div
5V
4A
2A
5V
0
0
V
LX
5V/div
I
L
2A/div
MAX1708 toc11
100μs/div
LINE TRANSIENT RESPONSE
V
OUT
AC-COUPLED
50mV/div
3.5V
3V
5V
V
IN
500mV/div
MAX1708 toc12
Typical Operating Characteristics (continued)
(Circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
P1-P3P4-P6P7-P9P10-P12P13-P14

MAX1708EEE+

Mfr. #:
Buy MAX1708EEE+
Manufacturer:
Maxim Integrated
Description:
Switching Voltage Regulators High f Step-Up DC/DC Converter
Lifecycle:
New from this manufacturer.
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