1-Cell to 3-Cell, High-Power (1A),
Low-Noise, Step-Up DC-DC Converters
MAX1700/MAX1701
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
REFERENCE VOLTAGE
vs. TEMPERATURE
MAX1700-04
REFERENCE VOLTAGE
vs. REFERENCE CURRENT
MAX1700-05
FREQUENCY vs. TEMPERATURE
320
315
FREQUENCY (kHz)
310
305
300
295
290
285
V
OUT
= 3.3V
V
OUT
= 5V
MAX1700-06
1.254
1.254
325
REFERENCE VOLTAGE (V)
1.250
REFERENCE VOLTAGE (V)
1.252
1.252
1.250
1.248
1.248
1.246
1.246
1.244
-40
-20
0
20
40
60
80
100
TEMPERATURE (°C)
1.244
0
10
20
30
40
50
60
70
80
REFERENCE CURRENT (µA)
280
-40 -20
0
20
40
60
80 100 120 140
TEMPERATURE (°C)
START-UP INPUT VOLTAGE
vs. OUTPUT CURRENT
MAX1700/01 TOC06a
PEAK INDUCTOR CURRENT
vs. OUTPUT VOLTAGE
MAX1700-08
2.3
2.1
START-UP INPUT VOLTAGE (V)
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
0.01
0.1
1
10
100
NO-LOAD START-UP:
1.0V AT -40°C
0.79 AT +25°C
0.64V AT +85°C
CONSTANT-CURRENT LOAD
V
OUT
= 3.3V
L = 10µH
D1 = MBR0520L
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
1.6
1.4
CURRENT LIMIT (A)
1.2
1.0
0.8
0.6
0.4
PFM
0.2
PWM
1000
2.5
3
3.5
4
4.5
5
5.5
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
HEAVY-LOAD SWITCHING WAVEFORMS
(V
OUT
= 3.3V)
MAX1700-08
LINE-TRANSIENT RESPONSE
MAX1700-09
V
OUT
A
0V
B
0V
0A
C
B
A
1µs/div
V
IN
= 1.1V, I
OUT
= 200mA, V
OUT
= 3.3V
A = LX VOLTAGE, 2V/div
B = INDUCTOR CURRENT, 0.5A/div
C = V
OUT
RIPPLE, 50mV/div, AC COUPLED
I
OUT
= 0mA, V
OUT
= 3.3V
5ms/div
A = V
IN
, 1.1V TO 2.1V, 1V/div
B = V
OUT
RIPPLE, 50mV/div, AC COUPLED
6
_______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
