Manual

MAX1802
Digital Camera Step-Down
Power Supply
6 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS
(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
GENERAL
Input Voltage Range V
IN
2.5 11 V
SUPPLY CURRENT
Shutdown Supply Current
(from VDDM and VDDC)
V
ONM
= 0 20 µA
V
FBM
= 1.5V, V
VDDC
= 0 600
Main DC-DC Converter
Supply Current (from VDDM)
V
FBM
= 1.5V, V
VDDC
= 3V 55
µA
Main DC-DC Converter
Supply Current (from VDDC)
V
FBM
= 1.5V, V
VDDC
= 3V 450 µA
Main plus Core Supply Current
(from VDDC)
V
FBM
= V
FBC
= 1.5V, V
ONC
= 3V 700 µA
Main plus Auxiliary 1 Supply
Current (from VDDC)
V
FBM
= V
FB1
= 1.5V, V
ON1
= V
DCON1
= 3V 750 µA
Main plus Auxiliary 2 Supply
Current (from VDDC)
V
FBM
= V
FB2
= 1.5V, V
DCON2
= 3V 750 µA
Main plus Auxiliary 3 Supply
Current (from VDDC)
V
FBM
= V
FB3
= 1.5V, V
DCON3
= 3V 750 µA
Total Supply Current
(from VDDC)
V
FBM
= V
FBC
= V
FB1
= V
FB2
= V
FB3
= 1.5V,
V
ONC
= V
ON1
= V
DCON1
= V
DCON2
=
V
DCON3
= 3V
1700 µA
VL REGULATOR
VL Output Voltage
6V < V
VDDM
< 11V,
0.1mA < I
LOAD
< 10mA
2.83 3.12 V
VL Supply Rejection 3.5V < V
VDDM
< 11V, V
VDDC
= 0 3 %
VL Undervoltage Lockout
Threshold
V
L
rising, 40mV hysteresis 2.25 2.50 V
VL Switchover Voltage to VDDC V
L
rising, 100mV hysteresis 2.3 2.5 V
VL to VDDC Switch Resistance 7 Ω
REFERENCE
Reference Output Voltage V
REF
I
REF
= 20µA 1.230 1.262 V
REF Load Regulation 10µA < I
REF
< 200µA 9 mV
REF Line Rejection 2.7V < V
OUT
< 5.5V 5 mV
REF Undervoltage Lockout
Threshold
REF rising, 20mV hysteresis 0.9 1.1 V
OSCILLATOR
OSC Discharge Trip Level OSC rising 1.225 1.275 V
OSC Input Bias Current V
OSC
= 1.1V 100 nA
OSC Discharge Resistance V
OSC
= 1.5V 100 Ω