Typical operating characteristics (continued) – Rainbow Electronics MAX1672 User Manual
Page 4
MAX1672
Step-Up/Down DC-DC Converter
in QSOP Package
4
_______________________________________________________________________________________
_____________________________Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
0
100
200
300
400
0
2
1
3
4
MAXIMUM OUTPUT CURRENT vs.
INPUT VOLTAGE (V
OUT
= 5V)
MAX1672-04
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (mA)
MAXIMUM RECOMMENDED
OUTPUT CURRENT
ILIM = GND (0.5A)
ILIM = PS (0.8A)
0
100
200
300
400
0
2
1
3
4
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE (V
OUT
= 3.3V)
MAX1672-05
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (mA)
MAXIMUM RECOMMENDED
OUTPUT CURRENT
ILIM = GND (0.5A)
ILIM = PS (0.8A)
0
100
200
300
400
4
5
7
8
9
11
6
10
12
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
(POWER DISSIPATION LIMIT)
MAX1672-06
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (mA)
MAXIMUM RECOMMENDED
OUTPUT CURRENT
V
OUT
= 5V
V
OUT
= 3.3V
T
A
= +25°C
T
A
= +85°C
V
OUT
= 3.3V
V
OUT
= 5V
MAXIMUM RECOMMENDED INPUT VOLTAGE
1000
10
0
1
2
3
4
5
6
7
8
9
10 11
NO-LOAD BATTERY CURRENT
vs. INPUT VOLTAGE
MAX1672-07
INPUT VOLTAGE (V)
SUPPLY CURRENT (
µ
A)
100
V
OUT
= 5V
V
OUT
= 3.3V
A
B
2ms/div
LINE-TRANSIENT RESPONSE
MAX1672-10
A: V
OUT
= 5V (100mV/div, AC COUPLED)
B: V
IN
= 2V TO 4V (I
OUT
= 100mA)
1
0.01
0
1
2
3
4
5
6
7
8
9
10 11
SHUTDOWN CURRENT
vs. INPUT VOLTAGE
MAX1672-08
INPUT VOLTAGE (V)
SUPPLY CURRENT (
µ
A)
0.1
70
10
0.01
1
10
100
0.1
1000
LINEAR REGULATOR POWER-SUPPLY
REJECTION RATIO vs. FREQUENCY
20
MAX1672-09
FREQUENCY (kHz)
PSRR (dB)
30
40
60
50
A
B
2ms/div
LOAD-TRANSIENT RESPONSE
MAX1672-11
A: V
OUT
= 5V (50mV/div, AC COUPLED)
B: I
OUT
= 10mA TO 100mA (V
IN
= 2V)
A
B
10
µ
s/div
OUTPUT RIPPLE (MEDIUM LOAD)
MAX1672-12
A: V
OUT
= 5V (20mV/div, AC COUPLED)
B: I
L1
(500mA /div) (V
IN
= 2.7V, I
OUT
= 80mA)