MAX1700 Maxim, MAX1700 Datasheet - Page 6

• Manufacturer Part Number: MAX1700
• Description: 1-Cell to 3-Cell / High-Power 1A / Low-Noise / Step-Up DC-DC Converters
• Manufacturer: Maxim

1-Cell to 3-Cell, High-Power (1A),
Low-Noise, Step-Up DC-DC Converters
(T
6
A
1.254
1.252
1.250
1.248
1.246
1.244
= +25°C, unless otherwise noted.)
_______________________________________________________________________________________
-40
A
B
C
V
A = LX VOLTAGE, 2V/div
B = INDUCTOR CURRENT, 0.5A/div
C = V
-20
IN
= 1.1V, I
OUT
REFERENCE VOLTAGE
HEAVY-LOAD SWITCHING WAVEFORMS
2.3
2.1
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
vs. TEMPERATURE
0
TEMPERATURE (°C)
0.01
RIPPLE, 50mV/div, AC COUPLED
OUT
NO-LOAD START-UP:
1.0V AT -40°C
0.79 AT +25°C
0.64V AT +85°C
CONSTANT-CURRENT LOAD
V
L = 10 H
D1 = MBR0520L
20
OUT
= 200mA, V
START-UP INPUT VOLTAGE
= 3.3V
0.1
40
(V
vs. OUTPUT CURRENT
OUTPUT CURRENT (mA)
OUT
1 s/div
OUT
60
= 3.3V)
1
= 3.3V
80
T
A
10
= +85°C
100
T
A
T
= +25°C
A
= -40°C
100
MAX1700-08
1.254
1.252
1.250
1.248
1.246
1.244
Typical Operating Characteristics (continued)
1000
0
V
0V
0A
OUT
10
vs. REFERENCE CURRENT
REFERENCE VOLTAGE
20
REFERENCE CURRENT ( A)
30
40
50
60
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
70
A
B
2.5
80
I
A = V
B = V
OUT
= 0mA, V
IN
OUT
3
PEAK INDUCTOR CURRENT
, 1.1V TO 2.1V, 1V/div
RIPPLE, 50mV/div, AC COUPLED
vs. OUTPUT VOLTAGE
325
320
315
310
305
300
295
290
285
280
OUTPUT VOLTAGE (V)
LINE-TRANSIENT RESPONSE
OUT
3.5
-40
= 3.3V
-20
FREQUENCY vs. TEMPERATURE
4
5ms/div
0
4.5
TEMPERATURE ( C)
20
PWM
PFM
40
5
60
5.5
V
V
OUT
OUT
80 100 120 140
MAX1700-09
= 5V
= 3.3V
0V