Typical operating characteristics (continued) – Rainbow Electronics MAX1567 User Manual
Page 10
MAX1566/MAX1567
Six-Channel, High-Efficiency, Digital
Camera Power Supplies
10
______________________________________________________________________________________
Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
0.5
1.0
1.5
2.0
2.5
3.0
0
2
1
3
4
5
NO-LOAD INPUT CURRENT
vs. INPUT VOLTAGE (SWITCHING)
MAX1566/67 toc10
INPUT VOLTAGE (V)
INPUT CURRENT (mA)
V
SU
= 5.0V ONLY
V
SU
= 5.0V
+ V
SD
= 1.8V
V
SU
= 5.0V
+ V
M
= 3.3V
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
600
200
400
800
1000
MINIMUM STARTUP VOLTAGE
vs. LOAD CURRENT (OUTSU)
MAX1566/67 toc11
LOAD CURRENT (mA)
MINIMUM STARTUP VOLTAGE (V)
WITH NO SCHOTTKY RECTIFER
FROM BATT TO PVSU
1.251
1.248
1.246
1.243
-50
25
-25
0
50
75
100
REFERENCE VOLTAGE vs. TEMPERATURE
MAX1566/67 toc12
TEMPERATURE (
°C)
REFERENCE VOLTAGE (V)
1.254
1.250
1.249
1.248
1.247
1.246
1.245
1.244
0
100
200
300
50
150
250
REFERENCE VOLTAGE
vs. REFERENCE LOAD CURRENT
MAX1566/67 toc13
REFERENCE LOAD CURRENT (
µA)
REFERENCE VOLTAGE (V)
0
1
1000
100
10
OSCILLATOR FREQUENCY vs. R
OSC
400
800
600
200
1000
MAX1566/7 toc14
R
OSC
(k
Ω)
OSCILLATOR FREQUENCY (kHz)
C
OSC
= 470pF
C
OSC
= 330pF
C
OSC
= 220pF
C
OSC
= 100pF
C
OSC
= 47pF
315
314
313
312
311
310
309
308
307
306
305
304
303
302
301
300
-50
25
-25
0
50
75
100
SWITCHING FREQUENCY vs. TEMPERATURE
MAX1566/67 toc15
TEMPERATURE (
°C)
SWITCHING FREQUENCY (kHz)
88
87
86
85
84
83
82
81
80
0
600
200
400
800
1000
1200
AUX_ MAXIMUM DUTY CYCLE
vs. FREQUENCY
MAX1566/67 toc16
FREQUENCY (kHz)
MAXIMUM DUTY CYCLE (%)
WHEN THIS DUTY CYCLE IS
EXCEEDED FOR 100,000 CLOCK CYCLES,
THE MAX1566/MAX1567 SHUT DOWN
C
OSC
= 100pF
STEP-UP STARTUP WAVEFORMS
MAX1566/67 toc17
100
µs/div
I
IN
1A/div
ONSU
2V/div
V
SU
= 3.3V
5V/div
I
OUT_SU
100mA/div
V
IN
= 2V, V
SU
= 3.3V
0V
0V
0A
0A
STEP-UP STARTUP WAVEFORMS
MAX1566/67 toc18
100
µs/div
I
IN
1A/div
ONSU
2V/div
V
SU
= 5V
5V/div
I
OUT_SU
100mA/div
V
IN
= 3.0V, V
SU
= 5V
0V
0V
0A
0A