MAX8680CETL+ ,Smallest, All-Internal MOSFET, 7-Channel DSC PMIC in Tiny 5mm x 5mm Thin QFNMAX8680ABRIDGED19-0681; Rev 2; 11/07Smallest, All-Internal MOSFET, 7-ChannelDSC PMIC in Tiny 5mm x ..
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MAX8680CETL+-MAX8680ETL+-MAX8680ETL+T
Smallest, All-Internal MOSFET, 7-Channel DSC PMIC in Tiny 5mm x 5mm Thin QFN
General DescriptionThe MAX8680 highly efficient complete power-supply
solution is designed for digital still cameras (DSCs) and
digital video cameras (DVCs). The device integrates
seven on-chip power MOSFET DC-DC converters with
up to 95% efficiency to power all critical power supplies
in DSC systems. Each converter also features True
Shutdown™, as well as internal compensation to mini-
mize external component count. The seven DC-DC
converter outputs are:Step-up synchronous-rectified DC-DC converter
(SU). The MAX8680 is bootstrapped from VSU.MAIN synchronous-rectified step-down DC-DC con-
verter (M) for DSP I/O supply voltage.DDRZ synchronous-rectified step-down DC-DC
converter (Z) for DSP DDR supply voltage.Low-voltage (down to 1V) synchronous-rectified
step-down DC-DC converter (SD) for DSP core sup-
ply voltage.High-voltage, step-up DC-DC converter with current
regulation and PWM dimming control (LEDBST) for
white LEDs (WLED).High-voltage step-up DC-DC converter (CCDBST)
for CCD imagers or positive LCD bias supplies.Transformerless inverting DC-DC converter (CCDINV)
for CCD imagers or negative LCD bias supplies.
The MAX8680 has an independent/simultaneous
power-on sequence of the CCDBST and CCDINV con-
verters. For a preset power-on sequence of CCDBST
before CCDINV, contact the factory.
The MAX8680 operates with 1-cell lithium-ion (Li+) bat-
tery, two-AA cell, or dual-battery designs and is avail-
able in a 5mm x 5mm, 40-pin thin QFN package. The
MAX8680 operates over the -40°C to +85°C extended
temperature range.
ApplicationsDSCs and DVCs
PDAs and Portable Media Players
GPS Navigation Systems
Features95% Efficient Synchronous-Rectified DC-DC
Converters90% Efficient Boost-Buck Operation85% Efficient DC-DC Converters for CCD, LCD,
WLED, and/or OLEDInternal Compensation on All ChannelsTrue Shutdown on All Step-Up ConvertersOverload ProtectionSoft-Start for Controlled Startup CurrentDropout Operation (100% Duty Cycle) on Step-
Down ConvertersRegulated Current Output for Up to 6 White LEDsPWM Dimming of WLED CurrentAdjustable LED Overvoltage Protection Up to 27VTransformerless Inverting Converter for CCD2MHz Switching Frequency for Low-Voltage
Channels±2.5% Switching Frequency Accuracy1µA Shutdown Supply CurrentPower-On Voltage Tracking for Core and Main
OutputsAll Internal Power MOSFETsSDOK
Power-OK Indicator
MAX8680
Smallest, All-Internal MOSFET, 7-Channel
DSC PMIC in Tiny 5mm x 5mm Thin QFNBATTSU STEP-UP
ONSUMAIN STEP-DOWN
DDRZ STEP-DOWN
LEDBST
CCDBST
CCDINV
ONM
ONSD
ONLED
ONBST
ONINV
ONZ
SD STEP-DOWN
VSU 5V
VMAIN 3.3V
VSD 1.8V
VDDRZ 2.5V
VLEDBST UP TO 6 WLEDs
VCCDBST +15V
VCCDINV -7.5V
INPUT
2.7V TO 5.5V
SDOK
MAX8680
Typical Operating Circuit19-0681; Rev 2; 11/07
Pin Configuration appears at the end of data sheet.
EVALUATION KITAVAILABLE
Ordering Information
PARTTEMP
RANGEPIN-PACKAGEPKG
CODEMAX8680ETL+-40°C to
+85°C
40 Thin QFN-EP*
5mm x 5mm x 0.8mmT4055-2
+Denotes a lead-free package.
ABRIDGED
MAX8680
Smallest, All-Internal MOSFET, 7-Channel
DSC PMIC in Tiny 5mm x 5mm Thin QFNBATT
LXSU
PVSU
FBSU
PGSU
(EP)
PGSU
(EP)
PGSD
(EP)
PGM
(EP)
LXM
VSU
VSU
(5V, 500mA)
PVM
FBM
VMAIN
(3.3V, 300mA)
PVSD
LXSD
FBSD
ONSU
ONM
ONLED
ONBST
ONINV
LXINV
FBINV
SWBST
LXBST
FBBST
PVLED
SWLED
LXLED
OVLED
FBLED
PGBST
(EP)
PGLED
(EP)
GND
REFPVINV
VBATT OR VSU
VBATT
(2V TO 5.5V)
VCCDBST
(15V, 30mA)
VLEDBST
(16V, 30mA)
VCCDINV
(-7.5V, 100mA)
ONSD
PVBST
C20
0.1μFC18
1μF
4.7μH
22μF
22μFL1
2μH
4.7μH
4.7μH
1μF
11, 12
19, 20
LXSU31
PVSULXZ
R16
100kΩ
VBATTONZ2
PGZ
(EP)
FBZ3
PVZ36
MAX8680
22μF
22μF
C16
0.1μF
R17
100Ω
100kΩ
232kΩ
402kΩ
10μF
10μF
VBATTC8
10μF
VBATT OR
VSU C11
1μF
VBATTC14
1μF
VBATT
VREF
C16
1μF
100kΩ
VSD
(1.8V, 250mA)
4.7μH
80kΩ
C10
10μF
10μF
100kΩ
VDDRZ
(2.5V, 200mA)
4.7μH
4.7μH
150kΩ
C12
10μF
C13
10μF
C15
1μF
100kΩ
1.6MΩ
R10
100kΩ
C17
1μF
C19
4.7μF
R11
1.4MΩ
R12
100kΩ
R13
604kΩ
R14
100kΩ
SDOK
R15
10Ω
Figure 1. MAX8680 Typical Application Circuit (for Li+ Cell Design, Connect PVZ and PVINV to BATT; for Two-AA or Dual-Battery
NOTE:ALL CONVERTERS’ POWER GROUND CONNECTIONS
ARE THROUGH THE EXPOSED PADDLE (EP).
ABRIDGED
This datasheet has been :
www.ic-phoenix.com
Datasheets for electronic components.
