MAX1926ETC Fast Delivery |IC PHOENIX CO.,LIMITED

MAX1926ETC ,Switch-Mode 1-Cell Li+ ChargersApplications12 Thin QFNMAX1925ETC -40°C to +85°C 4.5V to 6.1V4mm x 4mmDigital Cameras12 Thin QFNSel ..
MAX1926ETC ,Switch-Mode 1-Cell Li+ ChargersELECTRICAL CHARACTERISTICS(V = V = 0, V = V = V = 5V, V = V = V = 4V, THRM = 10kΩ to GND, C = 100nF ..
MAX1926ETC+ ,Switch-Mode 1-Cell Li+ ChargersELECTRICAL CHARACTERISTICS(V = V = 0, V = V = V = 5V, V = V = V = 4V, THRM = 10kΩ to GND, C = 100nF ..
MAX1926ETC+T ,Switch-Mode 1-Cell Li+ Chargersfeatures include automatic input power♦ Set Charge Current with One Resistordetection (ACON output) ..
MAX1927REUB ,Low-Output-Voltage / 800mA / PWM Step-Down DC-DC ConvertersFeaturesThe MAX1927/MAX1928 800mA step-down converters 800mA Output Currentpower low-voltage micro ..
MAX1927REUB ,Low-Output-Voltage / 800mA / PWM Step-Down DC-DC ConvertersELECTRICAL CHARACTERISTICS (continued)(V = 3.6V, SHDN = BATT, C = 0.1µF, T = 0°C to +85°C, unless o ..
MAX488EESA+ ,±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceiversapplications that are not ESD sensitive see the pin-and function-compatible MAX481, MAX483, MAX485, ..
MAX488EESA+T ,±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 TransceiversELECTRICAL CHARACTERISTICS(V = 5V ±5%, T = T to T , unless otherwise noted.) (Notes 1, 2)CC A MIN M ..
MAX488EPA ,Low-Power / Slew-Rate-Limited RS-485/RS-422 TransceiversFeaturesThe MAX481, MAX483, MAX485, MAX487–MAX491, and' In µMAX Package: Smallest 8-Pin SOMAX1487 a ..
MAX488EPA+ ,±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 TransceiversApplications:EMI and reduce reflections caused by improperly termi-MAX3460–MAX3464: +5V, Fail-Safe, ..
MAX488ESA ,Low-Power / Slew-Rate-Limited RS-485/RS-422 TransceiversMAX481/MAX483/MAX485/MAX487–MAX491/MAX148719-0122; Rev 5; 2/96Low-Power, Slew-Rate-LimitedRS-485/RS ..
MAX488ESA+ ,±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 TransceiversELECTRICAL CHARACTERISTICS(V = 5V ±5%, T = T to T , unless otherwise noted.) (Notes 1, 2)CC A MIN M ..

MAX1926ETC
Switch-Mode 1-Cell Li+ Chargers
General Description
The MAX1925/MAX1926 single-cell lithium-ion (Li+)
switch-mode battery chargers use an external PMOS
pass element step-down configuration. Charge current
is programmable, and an external capacitor sets the
maximum charge time.
Additional features include automatic input power
detection (ACONoutput), logic-controlled enable, and
temperature monitoring with an external thermistor. The
MAX1925 disables charging for inputs greater than
6.1V, while the MAX1926 charges for inputs between
4.25V and 12V.
The MAX1925/MAX1926 feature two precondition levels
to restore near-dead cells. The devices source 4mA to
a cell that is below 2V while sourcing C/10 to a cell
between 2V and 3V. Full charge current is then applied
above 3V. A CHGoutput drives an LED to indicate
charging (LED on) and fault conditions (LED blinking).
The MAX1925/MAX1926 are available in a 12-pin
4mm ✕4mm thin QFN package and are specified over
the extended temperature range (-40°C to +85°C). An
evaluation kit is available to speed design.
Applications
Digital Cameras
Self-Charging Battery Packs
PDAs
Cradle Chargers
FeaturesSmall (4mm ✕4mm) Package4.25V to 12V Input Range (MAX1926)Overvoltage Lockout at 6.1V (MAX1925)±0.75% Battery Regulation VoltageSet Charge Current with One ResistorAutomatic Input Power SenseLED (or Logic-Out) Charge Status and Fault
IndicatorProgrammable Safety TimerAutorestart at Cell = 4VThermistor Monitor Input
MAX1925/MAX1926
Switch-Mode 1-Cell Li+ Chargers
Ordering Information
Typical Operating Circuit
19-2556; Rev 1; 10/02
Pin Configuration
MAX1925/MAX1926
Switch-Mode 1-Cell Li+ Chargers
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VPGND= VGND= 0, VINP= VIN= VCHG= 5V, VBATT= VCS= VEN= 4V, THRM = 10kΩto GND, CCT= 100nF, TA= 0°C to +85°C,
unless otherwise noted. Typical values are at TA= +25°C.)
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.
IN, INP, ACONto GND...........................................-0.3V to +14V
CHG, EXT to PGND...................................-0.3V to (VINP+ 0.3V)
CS, BATT, EN, THRM to GND..................................-0.3V to +6V
CT to GND................................................................-0.3V to +4V
EN, THRM, CT to IN................................................-14V to +0.3V
INP to IN................................................................-0.3V to +0.3V
PGND to GND.......................................................-0.3V to +0.3V
CS to BATT............................................................-0.3V to +0.3V
EXT Continuous RMS Current.........................................±100mA
Continuous Power Dissipation (TA= +70°C)
Exposed Paddle Soldered to Board
(derate 16.9mW/°C above +70°C).............................1349mW
Exposed Paddle Unsoldered
(derate 9mW/°C above +70°C)....................................721mW
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
MAX1925/MAX1926
Switch-Mode 1-Cell Li+ Chargers
ELECTRICAL CHARACTERISTICS (continued)
(VPGND= VGND= 0, VINP= VIN= VCHG= 5V, VBATT= VCS= VEN= 4V, THRM = 10kΩto GND, CCT= 100nF, TA= 0°C to +85°C,
unless otherwise noted. Typical values are at TA= +25°C.)
MAX1925/MAX1926
Switch-Mode 1-Cell Li+ Chargers
ELECTRICAL CHARACTERISTICS
(VPGND= VGND= 0, VINP= VIN= VCHG= 5V, VBATT= VCS= VEN= 4V, THRM = 10kΩto GND, CCT= 100nF, TA= -40°C to +85°C,
MAX1925/MAX1926
Switch-Mode 1-Cell Li+ Chargers
Note 2:These specifications guarantee the thermistor interface detects a fault at the correct temperature (0°C to +5°C cold temper-
ature and 45°C to +50°C hot temperature) with Philips NTC Thermistor Series 640-6, 2322-640-63103, 10.0K at +25°C, ±5%
(or equivalent).
Note 3:A fault is generated if VTHRMlower than 1.4V during the cold test or higher than 1.4V during the hot test. Hot and cold tests
occur on alternate CT clock transitions.
Note 4:Specifications to -40°C are guaranteed by design and not production tested.
ELECTRICAL CHARACTERISTICS (continued)
(VPGND= VGND= 0, VINP= VIN= VCHG= 5V, VBATT= VCS= VEN= 4V, THRM = 10kΩto GND, CCT= 100nF, TA= -40°C to +85°C,
unless otherwise noted. Typical values are at TA= +25°C.) (Note 4)
MAX1925/MAX1926
Switch-Mode 1-Cell Li+ Chargers
Typical Operating Characteristics
(Circuit of Figure 1, VSUPPLY= 5V, VBATT= 4V, TA = +25°C, unless otherwise noted.)
MAX1925/MAX1926
Switch-Mode 1-Cell Li+ Chargers
FREQUENCY vs. BATTERY VOLTAGE
MAX1925/26 toc10
BATTERY VOLTAGE (V)
SWITCHING FREQUENCY (kHz)
TIMER vs. CT CAPACITANCE
MAX1925/26 toc11
CT CAPACITANCE (nF)
TIMER (MINUTES)
CHARGE CURRENT vs. TIME
MAX1925/26 toc12
TIME (h)
CHARGE CURRENT (A)
SWITCHING WAVEFORM
MAX1925/26 toc14
4µs/div
1.2A
0.8A
10V
100mV/
div
INDUCTOR
CURRENT
VLX
VBATT
SWITCHING WAVEFORM
MAX1925/26 toc15
1µs/div
1.2A
1.4A
0.8A
10V
100mV/
div
INDUCTOR
CURRENT
VLX
VBATT
CHARGE-ENABLE REPSONSE
MAX1925/26 toc16
INDUCTOR
CURRENTypical Operating Characteristics (continued)
(Circuit of Figure 1, VSUPPLY= 5V, VBATT= 4V, TA = +25°C, unless otherwise noted.)
MAX1925/MAX1926
Switch-Mode 1-Cell Li+ Chargers

Partno	Mfg	Dc	Qty	Available	Descript
MAX1926ETC	MAXIM	N/a	1104	avai	Switch-Mode 1-Cell Li+ Chargers
MAX1926ETC	MAX	N/a	50	avai	Switch-Mode 1-Cell Li+ Chargers