Manual

MAX1802
Digital Camera Step-Down
Power Supply
_______________________________________________________________________________________ 7
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)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
LOGIC INPUTS (ONM, ONC, ON1)
Input Low Level V
IL
0.4 V
ONM 1.8
Input High Level V
IH
ONC, ON1 1.6
V
Input Leakage Current
ONM: V
IN
= 0 or 11V;
ONC, ON1: V
IN
= 0 or 5V
1 µA
MAIN DC-DC CONVERTER
Main Output Voltage Adjust Range V
OUT
2.7 5.5 V
Main Idle Mode Threshold
V
OSC
= 0.625V, measured between
VDDM and LXM
2 35 mV
Main Current-Sense Amplifier
Voltage Gain
A
VCSM
Measured between VDDM and LXM 8.4 10.2 V/V
Main Zero-Crossing Threshold Measured between LXM and PGNDM -20 -8 mV
Main Slope Compensation Gain A
VSWM
0.16 0.24 V/V
MAIN ERROR AMPLIFIER
FBM Regulation Voltage Unity gain configuration, FBM = COMPM 1.230 1.265 V
FBM to COMPM
Transconductance
G
EA
U ni ty g ai n confi g ur ati on, FBM = C OM P M ,
- 5µA < I
LOA D
< 5µA
70 160 µS
FBM Input Leakage Current V
FBM
= 1.35V 100 nA
COMPM Minimum Output
Voltage
V
FBM
= 1.35V, COMPM open 0.3 V
COMPM Maximum Output
Voltage
V
COMPM
(
MAX
)
V
FBM
= 1.15V, COMPM open 2.00 2.27 V
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 11 Ω
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 40 360 mA
Core Current-Sense Amplifier
Transresistance
R
CSC
0.7 1.3 V/A
Core Slope Compensation Gain A
VSWC
0.16 0.24 V/V
CORE ERROR AMPLIFIER (V
ONC
= 3V)
FBC Regulation Voltage Unity gain configuration, FBC = COMPC 1.230 1.265 V
FBC to COMPC
Transconductance
G
EA
U ni ty g ai n confi g ur ati on, FBC = C OM P C ,
- 5µA < I
LOA D
< 5µA
70 160 µS