Manual

MAX1802
Digital Camera Step-Down
Power Supply
8 _______________________________________________________________________________________
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
FBC Input Leakage Current V
FBC
= 1.35V 100 nA
COMPC Minimum Output
Voltage
V
FBC
= 1.35V, COMPC open 0.3 V
COMPC Maximum Output
Voltage
V
COMPC
(
MAX
)
V
FBC
= 1.15V, COMPC open 2.00 2.27 V
CORE POWER SWITCHES (V
ONC
= 3V)
LXC Leakage Current V
LXC
= 0, 5.5V 20 µA
R
DSN
N-channel, I
LXC
= 0.75A 350
Switch On-Resistance
R
DSP
P-channel, I
LXC
= 0.75A 400
mΩ
N-Channel Turn-Off Current 5 190 mA
AUXILIARY DC-DC CONTROLLERS 1, 2, 3 (V
ON1
= V
DCON
_= 3V)
INTERNAL CLOCK
OSC Clock Low Trip Level OSC falling edge 0.2 0.3 V
V
DCON
_ = 0.625V 0.575 0.675 V
OSC Clock High Trip Level
V
DCON
_ = 1.25V to V
VL
1.00 1.10
Maximum Duty Cycle
Adjustment Range
40 90
%
DCON_ Input Leakage Current V
DCON
_ = 0V to 3V 1 µA
DCON_ Input Sleep-Mode
Threshold
V
DCON
_ rising, 50mV hysteresis 0.35 0.45 V
AUXILIARY ERROR AMPLIFIER
FB_ Regulation Voltage Unity gain configuration, FB_ = COMP_ 1.230 1.265 V
FB_ to COMP_
Transconductance
G
EA
Unity gain configuration, FB_ = COMP_,
-5µA < I
LOAD
< 5µA
70 160 µs
FB_ Input Leakage Current V
FB
_ = 1.35V 100 nA
AUXILIARY DRIVERS (DL1, DL2, DL3)
DL_ Driver Resistance Output high or low 11 Ω
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
VDDM
= 6V, V
VDDC
= 3V, PGNDM = PGND = GND, DCON1 = REF, V
ONM
= 3V, V
ONC
= V
ON1
= V
DCON2
=
V
DCON3
= 0, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
Note 1: Specifications to -40°C are guaranteed by design and not production tested.