Datasheet

MAX1763
1.5A, Low-Noise, 1MHz, Step-Up
DC-DC Converter
6 _______________________________________________________________________________________
Typical Operating Characteristics
(Circuit of Figure 2, V
IN
= +3.6V, V
OUT
= +5V, T
A
= +25°C, unless otherwise noted.)
100
0
0.001 0.01 0.1 1 10
EFFICIENCY vs. OUTPUT CURRENT
(V
OUT
= 3.3V)
20
MAX1763 toc01
OUTPUT CURRENT (A)
EFFICIENCY (%)
40
60
80
70
50
30
10
90
A
B
C
A: V
IN
= 2.4V
B: V
IN
= 1.2V
C: V
IN
= 0.9V
= NORMAL MODE
= FPWM MODE
100
0
0.001 0.01 0.1 1 10
EFFICIENCY vs. OUTPUT CURRENT
(V
OUT
= 5V)
20
MAX1763 toc02
OUTPUT CURRENT (A)
EFFICIENCY (%)
40
60
80
70
50
30
10
90
A
B
C
A: V
IN
= 3.6V
B: V
IN
= 2.4V
C: V
IN
= 1.2V
= NORMAL MODE
= FPWM MODE
0
1.0
0.5
2.0
1.5
2.5
3.0
0.8 2.41.6 3.2 4.0
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
MAX1763 toc03
INPUT VOLTAGE (V)
OUTPUT CURRENT (A)
V
OUT
= 3.3V
V
OUT
= 5V
0.1
0.0001
01 3 5
NO-LOAD INPUT
vs. INPUT VOLTAGE
0.001
0.01
MAX1763 toc04
INPUT VOLTAGE (V)
INPUT CURRENT (A)
24
= INPUT VOLTAGE INCREASING
= INPUT VOLTAGE DECREASING
10
0.1
046
1
INPUT VOLTAGE (V)
SHUTDOWN CURRENT (μA)
2
SHUTDOWN CURRENT
vs. INPUT VOLTAGE
1
3
5
MAX1763 toc05
0.80
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
-40 -15 10 35 60 85
INTERNAL OSCILLATOR FREQUENCY
vs. TEMPERATURE
MAX1763 toc06
TEMPERATURE (°C)
FREQUENCY (MHz)
V
IN
= 3.6V, V
OUT
= 5V
V
IN
= 2.4V, V
OUT
= 3.3V
0.6
1.6
1.1
2.6
2.1
3.6
3.1
4.1
0.001 0.10.01 1 10
STARTUP VOLTAGE
vs. OUTPUT CURRENT
MAX1763 toc07
OUTPUT CURRENT (A)
STARTUP VOLTAGE (V)
0
1.0
0.5
2.0
1.5
2.5
3.0
0 0.6 0.80.2 0.4 1.0 1.2 1.4
PEAK INDUCTOR CURRENT vs. V
ISET
MAX1763 toc08
ISET VOLTAGE (V)
PEAK INDUCTOR CURRENT (A)
HEAVY-LOAD SWITCHING WAVEFORMS
MAX1763 toc09
400ns/div
A
B
C
V
IN
= 2.4V, V
OUT
= 3.3V, I
OUT
= 1.5A
A: INDUCTOR CURRENT, 500mA/div
B: V
LX
, 2V/div
C: V
OUT
, 100mV/div, AC COUPLED