Rainbow Electronics MAX1701 - Manual (Page 6)

MAX1700/MAX1701
1-Cell to 3-Cell, High-Power (1A),
Low-Noise, Step-Up DC-DC Converters
6 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
1.244
1.246
1.250
1.248
1.252
1.254
-40 0 -20 20 40 60 80 100
REFERENCE VOLTAGE
vs. TEMPERATURE
MAX1700-04
TEMPERATURE (°C)
REFERENCE VOLTAGE (V)
1.244
1.246
1.250
1.248
1.252
1.254
0 20 30 10 40 50 60 70 80
REFERENCE VOLTAGE
vs. REFERENCE CURRENT
MAX1700-05
REFERENCE CURRENT ( µ A)
REFERENCE VOLTAGE (V)
0.2
0.6
0.4
1.0
0.8
1.4
1.2
1.6
2.5 3.5 4 3 4.5 5 5.5
PEAK INDUCTOR CURRENT
vs. OUTPUT VOLTAGE
MAX1700-08
OUTPUT VOLTAGE (V)
CURRENT LIMIT (A)
PFM
PWM
280
290
285
305
300
295
315
320
310
325
-40 20 40 -20 0 60 80 100 120 140
FREQUENCY vs. TEMPERATURE
MAX1700-06
TEMPERATURE ( ° C)
FREQUENCY (kHz)
V OUT = 5V
V OUT = 3.3V
I OUT = 0mA, V OUT = 3.3V
A = V IN , 1.1V TO 2.1V, 1V/div
B = V OUT RIPPLE, 50mV/div, AC COUPLED
LINE-TRANSIENT RESPONSE
A
B
0V
5ms/div
MAX1700-09
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
HEAVY-LOAD SWITCHING WAVEFORMS
(V OUT = 3.3V)
A
B
C
0A
0V
V OUT
1 µ s/div
MAX1700-08
0.5
0.01
START-UP INPUT VOLTAGE
vs. OUTPUT CURRENT
0.9
0.7
1.1
MAX1700/01 TOC06a
OUTPUT CURRENT (mA)
START-UP INPUT VOLTAGE (V)
100
1.7
1.5
2.1
1.9
1.3
0.1 10 1000
2.3
1
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 = 10 µ H
D1 = MBR0520L
T A = -40°C
T
A
= +25°C
T A = +85°C