Max1802 digital camera step-down power supply – Rainbow Electronics MAX1802 User Manual
Page 2
MAX1802
Digital Camera Step-Down
Power Supply
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VDDM, VH, ONM to GND .......................................-0.3V to +12V
PGNDM, PGND to GND ........................................-0.3V to +0.3V
VH to VDDM .............................................................-6V to +0.3V
VL to VDDM ............................................................-12V to +0.3V
VL, ONC, ON1, FB_, DCON_ to GND ......................-0.3V to +6V
VDDC, REF, OSC, COMP_ to GND ..............-0.3V to (VL + 0.3V)
DHM, DLM to PGNDM............................-0.3V to (VDDM + 0.3V)
LXM to PGNDM ......................................-0.6V to (VDDM + 0.6V)
DL1, DL2, DL3, LXC to PGND ................-0.3V to (VDDC + 0.3V)
Continuous Power Dissipation (T
A
= +70
°C)
32-Pin TQFP (derate 11.1mW/
°C above +70°C)........889mW
Operating Temperature Range ...........................-40
°C to +85°C
Junction Temperature ......................................................+150
°C
Storage Temperature Range. ............................-65
°C to +150°C
Lead Temperature (soldering, 10s) .................................+300
°C
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
3
20
µA
V
FBM
= 1.5V, V
VDDC
= 0
370
600
Main DC-DC Converter
Supply Current (from VDDM)
V
FBM
= 1.5V, V
VDDC
= 3V
35
55
µA
Main DC-DC Converter
Supply Current (from VDDC)
V
FBM
= 1.5V, V
VDDC
= 3V
270
450
µA
Main plus Core Supply Current
(from VDDC)
V
FBM
= V
FBC
= 1.5V, V
ONC
= 3V
410
700
µA
Main plus Auxiliary 1
Supply Current (from VDDC)
V
FBM
= V
FB1
= 1.5V, V
ON1
= 3V
470
750
µA
Main plus Auxiliary 2
Supply Current (from VDDC)
V
FBM
= V
FB2
= 1.5V, V
DCON2
= 3V
470
750
µA
Main plus Auxiliary 3
Supply Current (from VDDC)
V
FBM
= V
FB3
= 1.5V, V
DCON3
= 3V
470
750
µA
Total Supply Current
(from VDDC)
V
FBM
= V
FBC
= V
FB1
= V
FB2
= V
FB3
= 1.5V,
V
ONC
= V
ON1
= V
DCON2
= V
DCON3
= 3V
960
1700
µA
VL REGULATOR
VL Output Voltage
6V < V
VDDM
< 11V, 0.1mA < I
LOAD
< 10mA
2.83
3.00
3.12
V
VL Supply Rejection
3.5V < V
VDDM
< 11V, V
VDDC
= 0
3
%
VL Undervoltage Lockout
Threshold
VL rising, 40mV hysteresis
2.25
2.40
2.50
V
VL Switchover Voltage to
VDDC
VL rising, 100mV hysteresis
2.3
2.4
2.5
V
VL to VDDC Switch Resistance
7
Ω