MAX780DCAP ,Dual-Slot PCMCIA Analog Power ControllerGeneral Description _______
MAX780DCAP-T ,Dual-Slot, PCMCIA Analog Power ControllerApplications #1+5VMAX780AADRV5Notebook and Palmtop ComputersPersonal OrganizersBDRV3VCCDigital Came ..
MAX782CBX ,Triple-Output Power-Supply Controller for Notebook Computersfeatures include low-noise, fixed-frequency PWMON31 36SS3operation at moderate to heavy loads and a ..
MAX782CBX-T ,Triple-Output Power Supply Controller for Notebook ComputersApplications Q36 31 BST3Notebook Computers7 30Q2 DL3Portable Data TerminalsQ1 8 29V+Communicating C ..
MAX782RCBX ,Triple-Output Power-Supply Controller for Notebook ComputersFeatures' Dual PWM Buck Controllers (+3.3V and +5V)The MAX782 is a system-engineered power-supply c ..
MAX783CBX ,Triple-Output Power-Supply Controller for Notebook ComputersFeatures' Dual PWM Buck Controllers (+3.3V and +5V)The MAX783 is a system-engineered power-supply c ..
MB6M ,MINIATURE GLASS PASSIVATED SINGLE-PHASE BRIDGE RECTIFIERThermal Characteristics (TA = 25°C unless otherwise noted)Parameter Symbol MB2M MB4M MB6M UnitDevic ..
MB6S ,Bridge RectifiersThermal Characteristics (T = 25°C unless otherwise noted)AParameter Symbol MB2S MB4S MB6S UnitDevic ..
MB7117E , Schottky TTL 2048-Bit Bipolar Programmable Read-Only Memory
MB71A38-25 , PROGRAMMABLE SCHOTTKY 16384-BIT READ ONLY MEMORY
MB8117800A-60 ,2 M X 8 BIT FAST PAGE MODE DYNAMIC RAMapplications where very low power dissipation and high bandwidth are basic requirements of the desi ..
MAX780ACAG-MAX780AEAG-MAX780BCAG-MAX780BEAG-MAX780CCAG-MAX780CCNG-MAX780DCAP
Dual-Slot PCMCIA Analog Power Controller
MAX780
Dual-Slot PCMCIAAnalog Power Controller
________________________________________________________________Maxim Integrated Products1
Call toll free 1-800-998-8800 for free samples or literature.
Ordering Information continued on last page.* Contact factory for dice specifications.
19-0125; Rev. 1; 8/93
_______________General DescriptionThe MAX780A provides the power switching and status
signals necessary to control two Personal Computer
Memory Card International Association (PCMCIA)
Release 2.0 card slots. The MAX780A, used in conjunc-
tion with a PC Card Interface Digital Controller, forms a
complete, minimum component count PCMCIA interface
for palmtop and notebook computers.
The MAX780A incorporates two 0V/+5V/+12V/high-
impedance power outputs for flash VPPprogramming,
level shifters for power MOSFET control of two sepa-
rate +3.3V/+5V supplies, and two VPPpower-ready
status signals. The MAX780A may be directly con-
nected to the control outputs from a PCMCIA digital
controller, or may be configured to use internal edge-
triggered registers for connection to the CPU data bus.
The MAX780B has all the features of the MAX780A but
omits the reference and VPPvalid indicators. The
MAX780C has all the features of the MAX780A but
omits the registers for the digital inputs. The MAX780D
omits the reference, the VPPvalid indicators, and the
digital input registers.
___________________________FeaturesSSOP Circuit Fits in 0.09in2Smallest Complete Analog Controller for Two
PCMCIA (Release 2.0/JEIDA 4.1) PC Card SocketsDual VCCContols and VPPOutputsLogic-Compatible with Industry-Standard
PCMCIA Digital Controllers:
Intel 82365SL_DF
Fujitsu MB86301
Chips and Technology F8680
Cirrus Logic CL-PD67200V/+5V/+12V/High-Impedance VPPOutputsInternal 1.6ΩVPPPower SwitchesDual Voltage 3.3V/5V VCCOperationVPPPower-Ready Status Signals130µA Quiescent Supply Current
(3.5µA in Shutdown)Break-Before-Make Switching
______________Ordering Information
_______________________ApplicationsNotebook and Palmtop Computers
Personal Organizers
Digital Cameras
Handiterminals
Bar-Code Readers
__________Typical Operating Circuit
MAX780
Dual-Slot PCMCIAAnalog Power ControllerVCCIN to GND.........................................+7V, -0.3V
VPPINto GND......................................+13.2V, -0.3V
ADRV5, ADRV3, BDRV5, BDRV3 to GND...(VPPIN + 0.3V), -0.3V
AVPP, BVPP to GND.......................(VPPIN + 0.3V), -0.3V
All Other Pins to GND.....................(VCCIN + 0.3V), -0.3V
Continuous Power Dissipation (TA= +70°C)
20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)......889mW
20-Pin SSOP (derate 8.00mW/°C above +70°C)...........640mW
24-Pin Narrow Plastic DIP(derate 13.33 mW/°C above +70°C).1067mW
24-Pin SSOP(derate 8.00mW/°C above +70°C).......640mW
Operating Temperature Ranges:
MAX780_C__......................................0°C to +70°C
MAX780_E__...................................-40°C to +85°C
Storage Temperature Range...................-65°C to +160°C
Lead Temperature (soldering, 10sec)....................+300°C
ELECTRICAL CHARACTERISTICS(VCCIN = +5V, VPPIN = +12V, TA= TMINto TMAX, unless otherwise noted.)
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.
ABSOLUTE MAXIMUM RATINGS
_______________________________________________________________________________________3
MAX780
Dual-Slot PCMCIA Analog Power Controller
ELECTRICAL CHARACTERISTICS (continued)(VCCIN = +5V, VPPIN = +12V, TA= TMINto TMAX, unless otherwise noted.)
TIMING CHARACTERISTICS - MAX780A and MAX780B only(VCCIN= +3.3V or +5.0V, VPPIN = +12.0V, see Figure 4, TA= TMINto TMAX, unless otherwise noted.)
Note 1:Guaranteed by design, not production tested.
AVPP SWITCHINGAVPP1 5V/div
AGPI5V/div
+12.0V
5µs/div
C1 = C2 = 0V, AVPP0 = +5V, CIN = 10µF, CA= 0.1µF
__________________________________________Typical Operating Characteristics
AVCC SWITCHINGAVCC1 5V/div
+5V
2ms/div
C1 = +5V, C2 = 0V, AVCC0 = +5V, M1 = M2 = 3055EL,
RLOAD= 130Ω, CC= 1µF
+3.3V
AVCC 1V/div
AVPP 200mV/div
MAX780
Dual-Slot PCMCIAAnalog Power Controller________________________________________________________________________________________________
____________________________Typical Operating Characteristics (continued)AVPP SWITCH RESISTANCE
(12V MODE)
VPPIN (V)
SWITCH RESISTANCE (
REFERENCE LOAD REGULATION
LOAD CURRENT (μA)
REF VOLTAGE (V)
AVPP SWITCH RESISTANCE
(5V MODE)
VCCIN (V)
SWITCH RESISTANCE (
REFERENCE VOLTAGE
vs. TEMPERATURE
TEMPERATURE (°C)
REFERENCE VOLTAGE (V)
1.2466512585
MAX780
Dual-Slot PCMCIAAnalog Power Controller
_______________________________________________________________________________________5
________________________________________________________Pin Description
MAX780
Dual-Slot PCMCIAAnalog Power Controller_______________________________________________________________________________________
Table 1. AVPPControl Logic
Table 2. BVPPControl Logic
Table 3. ADRV3 and ADRV5 Control Logic
Table 4. BDRV3 and BDRV5 Control Logic
________________Detailed Description
VPPSwitchingAll four versions (A, B, C, and D) of the MAX780 allow
simple switching of PCMCIA card VPPto 0V, 5V, and
12V. On-chip power MOSFETs connect AVPP and
BVPP to either GND, VCCIN, or VPPIN. The AVPP0
and AVPP1 control logic inputs determine the state of
AVPP. Likewise, BVPP0 and BVPP1 control BVPP.
To prevent VPPovershoot due to parasitic inductance
in the +12V supply, the VPPIN bypass capacitor (CIN)
should be 10 times greater than the capacitance from
AVPP (CA) or BVPP (CB) to GND. Hence, when CA
and CBare 0.1µF, CINshould be 1.0µF.
The AGPIand BGPIstatus outputs signal when the VPP
lines are valid. AGPIgoes low when AVPP exceeds
11.05V; BGPIgoes low when BVPP exceeds 11.05V.
The status outputs and the reference are only active
when SHDNis high.
Pulling SHDNlow puts the MAX780 into a low supply-
current mode and disables the reference and the AGPI
and BGPIstatus outputs. The VCClevel shifters
ADRV5, ADRV3, BDRV5, BDRV3 are all forced low
when SHDNis low. VPPswitching is not affected by the
state of SHDN. Program AVPP and BVPP to 0V for low-
est power consumption when SHDNis low. Wait at
least 200µs after bringing the MAX780 out of shutdown
before checking AGPIor BGPIsince the reference
needs time to stabilize.
VCCSwitchingThe MAX780 contains level shifters that simplify driving
external power MOSFETs to switch PCMCIA card VCC
to 3.3V and 5V. While a PCMCIA card is being insert-
ed into the socket, the VCCpins on the card edge con-
nector should be powered down to 0V so that “hot
insertion” does not damage the PCMCIA card. The
simplest way to accomplish this is to pull out a
mechanical switch before the PCMCIA card is inserted.
The mechanical switch can be pushed in only when
the card has been fitted snugly into its socket. The
MAX780 Detailed Operating Circuit shows this method.
In the Detailed Operating Circuit, (with the mechanical
interlock switch closed) the PCMCIA card VCCcannot
be pulled more than a diode drop below 3.3V. The N-
channel power MOSFET that connects VCCto 3.3V has
its drain tied to VCCand its source tied to 3.3V, so that
its body diode prevents the card’s VCCfrom falling to
0V. If it were rotated so that the source connected to
VCC, then applying 5V to VCCwould short the 5V sup-
ply to the 3.3V supply via the MOSFET’s body diode.
