MAX1802 Datasheet, PDF (2/28 Pages) Maxim Integrated Products – Digital Camera Step-Down Power Supply

Digital Camera Step-Down
Power Supply
ABSOLUTE MAXIMUM RATINGS
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
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.
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.)
PARAMETER
GENERAL
Input Voltage Range
SUPPLY CURRENT
SYMBOL
V_IN
CONDITIONS
MIN TYP MAX UNITS
2.5
11
V
Shutdown Supply Current
(from VDDM and VDDC)
V_ONM = 0
3
20
µA
Main DC-DC Converter
Supply Current (from VDDM)
Main DC-DC Converter
Supply Current (from VDDC)
V_FBM = 1.5V, V_VDDC = 0
V_FBM = 1.5V, V_VDDC = 3V
V_FBM = 1.5V, V_VDDC = 3V
370 600
µA
35
55
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)
VL REGULATOR
VL Output Voltage
VL Supply Rejection
VL Undervoltage Lockout
Threshold
V_FBM = V_FBC = V_FB1 = V_FB2 = V_FB3 = 1.5V,
V_ONC = V_ON1 = V_DCON2 = V_DCON3 = 3V
960 1700
µA
6V < V_VDDM < 11V, 0.1mA < I_LOAD < 10mA 2.83 3.00 3.12
V
3.5V < V_VDDM < 11V, V_VDDC = 0
3
%
VL rising, 40mV hysteresis
2.25 2.40 2.50
V
VL Switchover Voltage to
VDDC
VL to VDDC Switch Resistance
VL rising, 100mV hysteresis
2.3
2.4
2.5
V
7
Ω
2 _______________________________________________________________________________________