Max1802 digital camera step-down power supply – Rainbow Electronics MAX1802 User Manual
Page 6
MAX1802
Digital Camera Step-Down
Power Supply
6
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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