MAX1566-MAX1567 Datasheet, PDF (10/35 Pages) Maxim Integrated Products – Six-Channel, High-Efficiency, Digital Camera Power Supplies

Six-Channel, High-Efficiency, Digital
Camera Power Supplies
(T_A = +25°C, unless otherwise noted.)
NO-LOAD INPUT CURRENT
vs. INPUT VOLTAGE (SWITCHING)
3.0
2.5
V_SU = 5.0V
+ V_M = 3.3V
2.0
1.5
V_SU = 5.0V
+ V_SD = 1.8V
1.0
V_SU = 5.0V ONLY
0.5
0
1
2
3
4
5
INPUT VOLTAGE (V)
Typical Operating Characteristics (continued)
MINIMUM STARTUP VOLTAGE
vs. LOAD CURRENT (OUTSU)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
WITH NO SCHOTTKY RECTIFER
FROM BATT TO PVSU
200 400 600 800 1000
LOAD CURRENT (mA)
REFERENCE VOLTAGE vs. TEMPERATURE
1.254
1.251
1.248
1.246
1.243
-50 -25 0 25 50
TEMPERATURE (°C)
75 100
REFERENCE VOLTAGE
vs. REFERENCE LOAD CURRENT
1.250
1.249
1.248
1.247
1.246
1.245
1.244
0
50 100 150 200 250 300
REFERENCE LOAD CURRENT (µA)
OSCILLATOR FREQUENCY vs. R_OSC
C_OSC = 470pF
1000
C_OSC = 330pF
C_OSC = 220pF
C_OSC = 100pF
800
C_OSC = 47pF
600
400
200
0
1
10
100
1000
R_OSC (kΩ)
SWITCHING FREQUENCY vs. TEMPERATURE
315
314
313
312
311
310
309
308
307
306
305
304
303
302
301
300
-50 -25 0 25 50 75 100
TEMPERATURE (°C)
AUX_ MAXIMUM DUTY CYCLE
vs. FREQUENCY
88
WHEN THIS DUTY CYCLE IS
87 EXCEEDED FOR 100,000 CLOCK CYCLES,
THE MAX1566/MAX1567 SHUT DOWN
86
85
84
C_OSC = 100pF
83
STEP-UP STARTUP WAVEFORMS
MAX1566/67 toc17
ONSU
2V/div
STEP-UP STARTUP WAVEFORMS
MAX1566/67 toc18
ONSU
2V/div
0V
0V
V_SU = 3.3V
5V/div
0V
0V
V_SU = 5V
5V/div
I_{OUT_SU}
I_{OUT_SU}
0A
100mA/div _0A
100mA/div
82
81
0A
80
0 200 400 600 800 1000 1200
FREQUENCY (kHz)
I_IN
1A/div
0A
V_IN = 2V, V_SU = 3.3V
100µs/div
V_IN = 3.0V, V_SU = 5V
100µs/div
I_IN
1A/div
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