MAX8857AETL+T ,Smallest, All-Internal MOSFET, 7-Channel 2 AA DSC PMICMAX8857AABRIDGED19-0987; Rev 1; 2/12Smallest, All-Internal MOSFET,7-Channel 2 AA DSC PMIC
MAX8858ETJ+T ,Smallest, All-Internal MOSFET, 6-Channel DSC PMIC in a 5mm x 5mm TQFNFeaturesThe MAX8858 PMIC provides a complete power-supply ♦ 95% Efficient Synchronous-Rectified DC- ..
MAX8860EUA18+ ,Low-Dropout, 300mA Linear Regulator in µMAXMAX886019-1422; Rev 2; 1/01Low-Dropout, 300mA Linear Regulator in µMAX
MAX8860EUA18+T ,Low-Dropout, 300mA Linear Regulator in µMAXMAX886019-1422; Rev 2; 1/01Low-Dropout, 300mA Linear Regulator in µMAX
MAX8860EUA25 ,Low-Dropout / 300mA Linear Regulator in MAXELECTRICAL CHARACTERISTICS(V = +3.6V, C = 33nF, T = -40°C to +85°C, unless otherwise noted. Typical ..
MAX8860EUA25 ,Low-Dropout / 300mA Linear Regulator in MAXfeatures include a 10nA, logic-controlled shut- Small, Space-Saving µMAX Package down mode, short ..
MB86626 , KeyWave AFE ADSL Analog Front End
MB86831 ,Microprocessor SPARClite CMOSapplications. Conforming to the SPARC * architecture, the MB86830 series is upward code-compatible ..
MB86831 ,Microprocessor SPARClite CMOSfeatures of the MB86830 series achieves high levels of speed, flexibility, and efficiency, making i ..
MB86831-80PFV ,32-bit Embedded Controllerapplications. Conforming to the SPARC * architecture, the MB86830 series is upward code-compatible ..
MB86833 ,Microprocessor SPARClite CMOSfeatures of the MB86830 series achieves high levels of speed, flexibility, and efficiency, making i ..
MB86836 ,Microprocessor SPARClite CMOSapplications. Conforming to the SPARC * architecture, the MB86830 series is upward code-compatible ..
MAX8857AETL+-MAX8857AETL+T
Smallest, All-Internal MOSFET, 7-Channel 2 AA DSC PMIC
General DescriptionThe MAX8857A PMIC provides a complete power-sup-
ply solution for digital still cameras (DSCs) and digital
video cameras (DVCs). The MAX8857A improves per-
formance, component count, and board space utiliza-
tion compared to currently available solutions for 2 AA
cell and dual-battery designs. On-chip power
MOSFETs provide up to 95% efficiency for critical
power supplies. The CCD inverter can operate directly
from 2 AA/NiMH batteries without the use of any addi-
tional external components.Step-up synchronous-rectified DC-DC converter
(SU). The MAX8857A is bootstrapped from VSU.MAIN synchronous-rectified step-up DC-DC converter
(M) with active discharge for DSP I/O supply voltage.SDZ synchronous-rectified step-down DC-DC con-
verter (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.Step-up DC-DC converter with current regulation
and PWM dimming control (LEDBST) for up to 6
series 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. This
converter can connect directly to 2 AA batteries.The MAX8857A 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 MAX8857A is available in a 5mm x 5mm, 40-pin thin
QFN package and operates over the -40°C to +85°C
extended temperature range.
ApplicationsDSCs and DVCs
PDAs and Portable Media Players
Features95% Efficient Synchronous-Rectified DC-DC
Converters90% Efficient Boost-Buck OperationUp to 85% Efficient, High-Voltage DC-DC
Converters Inverter Operates Directly from 2 AA BatteriesInternal Compensation on All ChannelsTrue Shutdown™on All Step-Up ConvertersOverload ProtectionStartup into Short ProtectionSoft-Start for Controlled Startup Current100% 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 ±2.5% Switching Frequency1µA Shutdown Supply CurrentCCD Voltage SequencingAll Internal Power MOSFETsSDOK Power-OK Indicator
Smallest, All-Internal MOSFET,
7-Channel 2 AA DSC PMICPVBSTSU STEP-UP
ONSUMAIN STEP-UP
SDZ 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
1.8V TO 5.5V
SDOK
MAX8857A
Typical Operating Circuit19-0987; Rev 1; 2/12
Pin Configuration appears at the end of data sheet.
EVALUATION KIT
AVAILABLE
Ordering Information
PARTTEMP
RANGEPIN-PACKAGEPKG
CODEMAX8857AETL+-40°C to
+85°C
40 Thin QFN-EP*
5mm x 5mm x 0.8mmT4055-2
MAX8857AETL+
TCBR
-40°C to
+85°C
40 Thin QFN-EP*
5mm x 5mm x 0.8mmT4055-2
+Denotes a lead-free package.
*EP =Exposed paddle.
ABRIDGED
MAX8857A
Smallest, All-Internal MOSFET,
7-Channel 2 AA DSC PMICLXSU
PVSU
FBSU
PGSU
(EP)
PGSD
(EP)
PGM
(EP)
PVM
VBATT
VSU
(5V, 500mA)
LXM
FBM
VMAIN
(3.3V, 300mA)
PVSD
LXSD
FBSD
ONSU
NOTE 1:ALL ON_ PINS HAVE INTERNAL 1MΩ
PULLDOWN TO GROUND.
NOTE 2:ALL CONVERTERS’ POWER GROUND
CONNECTIONS ARE THROUGH THE
EXPOSED PADDLE (EP).
ONM
ONLED
ONBST
ONINV
LXINV
FBINV
SWBST
LXBST
FBBST
PVLED
SWLED
LXLED
OVLED
FBLED
PGBST
(EP)
PGLED
(EP)
GND
REFPVINV
VBATT
VBATT
(1.8V TO 5.5V)
VCCDBST
(15V, 30mA)
VLEDBST
(16V, 25mA)
VCCDINV
(-7.5V, 100mA)
ONSD
PVBST
C20
0.1μFC18
1μF
1μH
22μF
22μFL1
2μH
2.2μH
10μH
1μF
39,
1, 2
LXSU31
PVSULXZ
R16
100kΩ
VBATTONZ38
PGZ
(EP)
FBZ5
PVZ36
MAX8857A
22μF
22μF
C21
0.1μF
R17
100Ω
100kΩ
23.2kΩ
402kΩ
22μF
22μF
VBATTC8
10μF
VSU C11
1μF
VBATTC14
1μF
VBATT
VREF
C16
1μF
10kΩ
VSD
(1.8V, 250mA)
4.7μH
80.6kΩ
C10
10μF
10μF
100kΩ
VDDRZ
(2.5V, 200mA)
4.7μH
4.7μH
150kΩ
C12
10μF
C13
10μF
C15
3.3μF
100kΩ
1.6MΩ
R10
100kΩ
C17
2.2μF
C19
10μF
R11
1.4MΩ
R12
100kΩ
R13
604kΩ
R14
100kΩ
SDOK
R15
10Ω
VBATT
VSU
PVGD19
VSUC23
1μF, OPTIONAL
VREF
ABRIDGED
This datasheet has been :
www.ic-phoenix.com
Datasheets for electronic components.
