Rainbow Electronics MAX1802 - Manual (Page 4)

MAX1802
Digital Camera Step-Down
Power Supply
4 _______________________________________________________________________________________
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MAIN SOFT-START
Soft-Start Interval OSC falling edge 1024
OSC
cycles
MAIN DRIVERS (DHM, DLM)
Output Low Voltage I SINK = 10mA 0.11 V
Output High Voltage I SOURCE = 10mA
V VDDM -
0.11
V
Driver Resistance I DHM = 10mA, I DLM = 10mA 4 11 Ω
Drive Current
Sourcing or sinking,
V
DHM or V VL = V VDDM / 2
400 mA
CORE DC-DC CONVERTER (V ONC = 3V)
Core Output Voltage Adjust
Range
V OUT 1.25 5.5 V
Core Idle Mode Threshold V OSC = 0.625V 70 190 320 mA
Core Current-Sense Amplifier
Transresistance
R CSC 0.7 1.0 1.3 V/A
Core Slope Compensation Gain A VSWC 0.16 0.20 0.24 V/V
CORE ERROR AMPLIFIER (V ONC = 3V)
FBC Regulation Voltage Unity gain configuration, FBC = COMPC 1.233 1.248 1.263 V
FBC to COMPC
Transconductance
G EA
Unity gain configuration, FBC = COMPC,
-5
µA < I
LOAD < 5 µA
70 100 160 µS
FBC Input Leakage Current V
FBC
= 1.35V 5 100 nA
COMPC Minimum Output
Voltage
V FBC = 1.35V, COMPC open 0.3 V
COMPC Maximum Output
Voltage
V COMPM (MAX) V FBC = 1.15V, COMPC open 2.00 2.14 2.27 V
CORE SOFT-START (V ONC = 3V)
Soft-Start Interval 1024
OSC
cycles
CORE POWER SWITCHES (V ONC = 3V)
LXC Leakage Current V LXC = 0, 5.5V 0.01 20 µA
R DSN N-channel, I LXC = 0.75A 150 350
Switch On-Resistance
R DSP P-channel, I LXC = 0.75A 180 400
m Ω
P-Channel Current Limit V OSC = 0.625V 0.75 A
N-Channel Turn-Off Current 18 100 180 mA
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 = 0°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.)