MAX1584/MAX1585
5-Channel Slim DSC Power Supplies
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
PV, PVSU, PVSD, SDOK, AUX1OK, SCF, ON_, FB_ to
GND..........................................................................-0.3V to +6V
PGND to GND....................................................…-0.3V to +0.3V
INDL2, DL1, DL3 to GND.........................-0.3V to (PVSU + 0.3V)
DL2 to GND ............................................-0.3V to (INDL2 + 0.3V)
PV to PVSU ...........................................................-0.3V to + 0.3V
LXSU Current (Note 1) ..........................................................3.6A
LXSD Current (Note 1) ........................................................2.25A
REF, OSC, CC_ to GND...........................-0.3V to (PVSU + 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
32-Pin Thin QFN (derate 22mW/°C above +70°C) ....1700mW
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
ELECTRICAL CHARACTERISTICS
(V
PVSU
= V
PV
= V
PVSD
= V
INDL2
= 3.6V, T
A
= 0°C to +85°C, unless otherwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
GENERAL
Input Voltage Range (Note 2) 0.7 5.5 V
Step-Up Minimum Startup
Voltage
I
LOAD
< 1mA, T
A
= +25°C, startup voltage tempco is
-2300ppm/°C (typ) (Note 3)
0.9 1.1 V
Shutdown Supply Current into PV PV = 3.6V 0.1 5 µA
Supply Current into PV with
Step-Up Enabled
ONSU = 3.6V, FBSU = 1.5V
(does not include switching losses)
300 450 µA
Supply Current into PV with
Step-Up and Step-Down Enabled
ONSU = ONSD = 3.6V, FBSU = 1.5V, FBSD = 1.5V
(does not include switching losses)
450 700 µA
Total Supply Current from PV and
PVSU with Step-Up and One AUX
Enabled
ONSU = ON1 = 3.6V, FBSU = 1.5V, FB2 = 1.5V
(does not include switching losses)
400 650 µA
REFERENCE
Reference Output Voltage I
REF
= 20µA 1.23 1.25 1.27 V
Reference Load Regulation 10µA < I
REF
< 200µA 4.5 10 mV
Reference Line Regulation 2.7 < PVSU < 5.5V 1.3 5 mV
OSCILLATOR
OSC Discharge Trip Level Rising edge 1.225 1.25 1.275 V
OSC Discharge Resistance OSC = 1.5V, I
OSC
= 3mA 52 80 Ω
OSC Discharge Pulse Width 150 ns
OSC Frequency R
OSC
= 47kΩ, C
OSC
=100pF 500 kHz
STEP-UP DC-DC CONVERTER
Step-Up Startup-to-Normal
Operating Threshold
Rising edge or falling edge (Note 4) 2.30 2.5 2.65 V
Step-Up Startup-to-Normal
Operating Threshold Hysteresis
80 mV
Note 1: LXSU has internal clamp diodes to PVSU and PGND, and LXSD has internal clamp diodes to PVSD and PGND. Applications
that forward bias these diodes should take care not to exceed the device’s power dissipation limits.
(26 paginas)
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