Rainbow Electronics MAX1567 - Manual (Page 4)

MAX1566/MAX1567
Six-Channel, High-Efficiency, Digital
Camera Power Supplies
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V PVSU = V PV = V PVM = V PVSD = V INDL2 = 3.6V, T A = 0°C to +85°C, unless otherwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Step-up mode (SUSD = PVSU) 80 85 90
Maximum Duty Cycle (Note 6)
Step-down mode (SUSD = GND) 95
%
LXM Leakage Current V LXM = 0 to 3.6V, PVSU = 3.6V 0.1 5 µA
N channel 95 150
Switch On-Resistance
P channel 150 250
m Ω
Step-up mode (SUSD = PVSU) 1.8 2.1 2.4
Main Switch Current Limit
Step-down mode (SUSD = GND) 0.70 0.8 0.95
A
Step-up mode (SUSD = PVSU) 20 Synchronous Rectifier
Turn-Off Current
Step-down mode (SUSD = GND) 20
mA
Soft-Start Interval 4096
OSC
cycles
STEP-DOWN DC-TO-DC CONVERTER
Step-Down Output-Voltage Adjust
Range
PVSD must be greater than output (Note 7) 1.25 5.00 V
FBSD Regulation Voltage 1.231 1.25 1.269 V
FBSD to CCSD
Transconductance
FBSD = CCSD 80 135 185 µS
FBSD Input Leakage Current FBSD = 1.25V -100 0.1 +100 nA
Idle Mode Trip Level 100 mA
Current-Sense Amplifier
Transresistance
0.5 V/A
LXSD Leakage Current V LXSD = 0 to 3.6V, PVSU = 3.6V 0.1 5 µA
N channel 95 150
Switch On-Resistance
P channel 150 250
m Ω
P-Channel Current Limit 0.65 0.77 0.90 A
N-Channel Turn-Off Current 20 mA
Soft-Start Interval 2048
OSC
cycles
SDOK Output Low Voltage 0.1mA into SDOK 0.01 0.1 V
SDOK Leakage Current ONSU = GND 0.01 1 µA
AUX1, 2, 3 DC-TO-DC CONTROLLERS
INDL2 Undervoltage
Lockout
2.45 2.5 2.55 V
Maximum Duty Cycle FB_ = 1V 80 85 90 %
FB1, FB2 (MAX1566), FB3H
Regulation Voltage
1.231 1.25 1.269 V
FB2 (MAX1567) Inverter
Regulation Voltage
-0.01 0 +0.01 V