MAX780DCAP-T Fast Delivery |IC PHOENIX CO.,LIMITED

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MAX780DCAP-T
Dual-Slot, PCMCIA Analog Power Controller
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 Description
The 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.
PARTTEMP. RANGEPIN-PACKAGE
MAX780ACNG24 Narrow Plastic DIP
MAX780ACAG24 SSOP
MAX780AC/D0°C to+70°CDice*
MAX780AENG24 Narrow Plastic DIP
MAX780AEAG-40°C to+85°C24 SSOP
0°C to+70°C
0°C to+70°C
-40°C to+85°C
___________________________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
_______________________Applications
Notebook and Palmtop Computers
Personal Organizers
Digital Cameras
Handiterminals
Bar-Code Readers
Part
Number
Reference &
VPPStatus
Indicators
Registers for
Direct
Connection to
CPU Data Bus
Dual VPP
Switches &
Level Shifters
for VCC
Switching
MAX780A✔✔✔
MAX780B✔✔
MAX780C✔✔
MAX780D✔+12V+5V
+3.3V
VPPINVCCIN
ADRV3
ADRV5
+5V
+5V
BDRV3
BDRV5
AVPP
BVPP
SHDN
DIGITAL
I/O
REF
GND
VPP
VCC
PCMCIA SLOT
VPP
VCC
PCMCIA SLOT
PCMCIA
DIGITAL
CONTROLLER
MAX780A
__________Typical Operating Circuit
PARAMETER
Dual-Slot PCMCIAAnalog Power Controller_______________________________________________________________________________________
VCCIN 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
CONDITIONSUNITS
POWER REQUIREMENTS
VCCIN Input Voltage RangeV
VPPINInput Voltage Range012.6V
VCCINSupply Current5V mode130300μA12V or 0V mode60
VCCINStandby Current3.510μA
VPPINStandby CurrentSHDN= 0V, VPPIN= 4.75V0.11μA
DC CHARACTERISTICS
AVPP, BVPP Switch Resistance
High-impedance mode150nA
ILOAD= 1mA0.10.4V
VOLTAGE REFERENCE (MAX780A and MAX780C only)
REFVoltageILOAD= 0μA1.221.251.28V1.211.251.29
REFTemperature Coefficient20ppm/°C
REFLine RegulationVCCIN = 2.85V to 5.5V0.5mV/V
REFLoad RegulationILOAD= 0μA to 100μA2μV/μA
AGPI, BGPIPower-Ready ThresholdMAX780_C10.7211.0511.40VMAX780_E10.6811.0511.40
AGPI, BGPIPower-Ready Hysteresis12Vmode130mV
SHDN= 0V, all logic inputs at GND or
VCCIN
VPPIN = 11.4V, 0mA < ILOAD< 60mA,
12V mode
VCCIN = 4.5V, 0mA < ILOAD< 1mA,
5V mode
VPPIN = 11.4V, 0mA < ILOAD< 1mA,
0V mode
ADRV3, ADRV5, BDRV3, BDRV5
Leakage Current
ADRV3, ADRV5, BDRV3, BDRV5
Output Voltage Low
MAX780_C
MAX780_E
VPPIN ﬂ
VPPIN ›
VPPINSupply Current185450μAVPPIN = 12.6V10
12V mode
5V mode
MINTYPMAX
_______________________________________________________________________________________3
Dual-Slot PCMCIA Analog Power Controller
ELECTRICAL CHARACTERISTICS (continued)
(VCCIN = +5V, VPPIN = +12V, TA= TMINto TMAX, unless otherwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITS
LOGIC SECTION
Logic Input Leakage Current1μA
Logic Input High2.4V
Logic Input Low0.8V
AGPI, BGPILogic Output HighILOAD= 1mAVCCINVCCIN
-0.4-0.2V
AGPI, BGPILogic Output LowILOAD= 1mA0.060.4V
TIMING CHARACTERISTICS - MAX780A and MAX780B only
(VCCIN= +3.3V or +5.0V, VPPIN = +12.0V, see Figure 4, TA= TMINto TMAX, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSPulse WidthtLA125ns
_VPP_, _VCC_ Setup TimetAS100ns
_VPP_, _VCC_ Hold TimetAH(Note 1)0nsns_VCC_ to _DRV_ Propagation
Delay
Note 1:Guaranteed by design, not production tested.
AVPP SWITCHING
AVPP1 5V/div
AGPI5V/div
+12.0V
5µs/div
C1 = C2 = 0V, AVPP0 = +5V, CIN = 10µF, CA= 0.1µF
__________________________________________Typical Operating Characteristics
AVCC SWITCHING
AVCC1 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
Dual-Slot PCMCIAAnalog Power Controller________________________________________________________________________________________________
____________________________Typical Operating Characteristics (continued)
AVPP SWITCH RESISTANCE
(12V MODE)
VPPIN (V)
(W
+125°C
+85°C
+25°C
-55°C
VCCIN = +5.0V,
C1 = C2 = AVPP = 0V,
AVPP = +5.0V
REFERENCE LOAD REGULATION
LOAD CURRENT (mA)
F V
(V
+125°C
+25°C
-55°C
SHDN = +5.0V,
VCCIN = +5.0V,
VPPIN = +12.0V
AVPP SWITCH RESISTANCE
(5V MODE)
VCCIN (V)
(W
+125°C
+25°C
-55°C
VPPIN = +12.0V,
C1 = C2 = 0V,
AVPP0 = VCCIN
AVPP1 = 0V
REFERENCE VOLTAGE
vs. TEMPERATURE
TEMPERATURE (°C)
(V
SHDN = +5.0V,
VCCIN = +5.0V,
VPPIN = +12.0V
Dual-Slot PCMCIAAnalog Power Controller
_______________________________________________________________________________________5
________________________________________________________Pin Description
PIN
NAMEFUNCTIONC21C1WR
4, 52, 3Logic inputs that control the voltage on AVPP.
6, 74, 5Logic inputs that control the voltage on BVPP.
8, 96, 7Logic inputs that control the state of the MOSFET gate drivers ADRV3 and ADRV5.
10, 118, 9Logic inputs that control the state of the MOSFET gate drivers BDRV3 and BDRV5.
12, 1310, 11BDRV5,
BDRV3
14, 1512, 13ADRV5,
ADRV3BGPIAGPI14SHDNN.C.No connect. Not internally connected.REF1.25V reference voltage output (MAX780A and MAX780C only). Make no connection to
this pin for MAX780B.)16BVPPSwitched output that provides 0V, 5V, or 12V to the VPPpins of slot B.17AVPPSwitched output that provides 0V, 5V, or 12V to the VPPpins of slot A.18VCCIN+5V power input19VPPIN+12V power input. VPPIN can have 0V or 5V applied as long as VCCIN = 5V.20GNDGround
MAX780A/B/C
Pin-strap input that selects edge-triggered register or direct digital inputs. Tying C2 to
VCCIN makes the logic inputs edge triggered; inputs to pins 4-11 are clocked in on the
rising edge of WR. Tying C2 to GND allows control signals to be directly applied to the
logic inputs on pins 4-11. Connect to GND for MAX780C.
Pin-strap input that selects one of two logic decode modes for the digital inputs. See Tables 1-3.
Logic-level power-ready output that stays low as long as BVPP is greater than 11.05V
(MAX780A and MAX780C only). Make no connection to this pin for MAX780B.
Logic-level power-ready output that stays low as long as AVPP is greater than 11.05V
(MAX780A and MAX780C only). Make no connection to this pin for MAX780B.
Logic input that shuts the MAX780 down to a low supply-current state when brought
low. Asserting SHDNforces ADRV3, BDRV3, ADRV5, BDRV5, REF, AGPI, and BGPI
low. All VPPinputs and outputs are functional for either state of SHDN. Program AVPP
and BVPP to 0V for lowest power consumption.
Write pulse input. When C2 is tied to VCCIN, a rising edge on WRclocks in the VCC
and VPPenables. When C2 is tied to GND, inputs to WRhave no effect. Connect to
GND for MAX780C.
AVCC1,
AVCC0
BVCC1,
BVCC0
AVPP1,
AVPP0
BVPP1,
BVPP0
Open-drain gate driver outputs that control the MOSFETs that switch the VCCpin of slot
B to 0V, 3.0V/3.3V, or 5V.
MAX780D
Open-drain gate driver outputs that control the MOSFETs that switch the VCCpin of slot
A to 0V, 3.0V/3.3V, or 5V.
Dual-Slot PCMCIAAnalog Power Controller_______________________________________________________________________________________AVPP1AVPP0AVPP000V01VCCIN10VPPIN11High-Z000V010V10VCCIN11VPPINBVPP1BVPP0BVPP000V01VCCIN10VPPIN11High-Z000V010V10VCCIN11VPPINAVCC1AVCC0ADRV3ADRV5000V0V01Hi-Z0V100VHi-Z110V0V000V0V010V0V100VHi-Z11Hi-Z0VBVCC1BVCC0BDRV3BDRV5000V0V01Hi-Z0V100VHi-Z110V0V000V0V010V0V100VHi-Z11Hi-Z0V
Table 1. AVPPControl Logic
Table 2. BVPPControl Logic
Table 3. ADRV3 and ADRV5 Control Logic
Table 4. BDRV3 and BDRV5 Control Logic
________________Detailed Description
VPPSwitching
All 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.
VCCSwitching
The 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.

Partno	Mfg	Dc	Qty	Available	Descript
MAX780DCAP-T \|MAX780DCAPT	MAXIM	N/a	716	avai	Dual-Slot, PCMCIA Analog Power Controller