MAX1817EUB+ Fast Delivery |IC PHOENIX CO.,LIMITED

MAX1817EUB+ ,Compact, High-Efficiency, Dual-Output, Step-Up DC-DC ConverterApplications Ordering InformationOrganizers/Translators PART TEMP. RANGE PIN-PACKAGE MAX1817EUB -40 ..
MAX1818EUT15#TG16 ,500mA, Low-Dropout Linear Regulator in SOT23FeaturesThe MAX1818 low-dropout linear regulator operates♦ Guaranteed 500mA Output Currentfrom a +2 ..
MAX1818EUT15-T ,500mA, Low-Dropout Linear Regulator in SOT23ApplicationsNotebook ComputersPART* TEMP RANGE PIN-PACKAGECellular and Cordless Telephones MAX1818E ..
MAX1818EUT18 ,500mA Low-Dropout Linear Regulator in SOT23ELECTRICAL CHARACTERISTICS(V = V + 500mV or V = +2.5V, whichever is greater; SHDN = IN, T = -40°C t ..
MAX1818EUT18#G16 ,500mA, Low-Dropout Linear Regulator in SOT23MAX181819-1860; Rev 2; 6/08500mA Low-DropoutLinear Regulator in SOT23
MAX1818EUT18#TG16 ,500mA, Low-Dropout Linear Regulator in SOT23FeaturesThe MAX1818 low-dropout linear regulator operates♦ Guaranteed 500mA Output Currentfrom a +2 ..
MAX4684ETB ,0.5 /0.8 Low-Voltage / Dual SPDT Analog Switches in UCSPApplicationsSpeaker Headset Switching PIN/BUMP-TOPPART TEMP RANGEMARKPACKAGEMP3 PlayersMAX4684EBC - ..
MAX4684ETB+ ,0.5Ω/0.8Ω Low-Voltage, Dual SPDT Analog Switches in UCSPFeatures♦ 12-Bump, 0.5mm-Pitch UCSPThe MAX4684/MAX4685 low on-resistance (R ), low-ON♦ NC Switch Rv ..
MAX4684ETB+T ,0.5Ω/0.8Ω Low-Voltage, Dual SPDT Analog Switches in UCSPMAX4684/MAX468519-1977; Rev 4; 1/09Ω Ω Ω Ω0.5 /0.8 Low-Voltage, Dual SPDT Analog Switches in UCSP
MAX4684EUB ,0.5 /0.8 Low-Voltage / Dual SPDT Analog Switches in UCSPMAX4684/MAX468519-1977; Rev 3; 2/030.5Ω/0.8Ω Low-Voltage, Dual SPDT Analog Switches in UCSP
MAX4684EUB+ ,0.5Ω/0.8Ω Low-Voltage, Dual SPDT Analog Switches in UCSPMAX4684/MAX468519-1977; Rev 4; 1/09Ω Ω Ω Ω0.5 /0.8 Low-Voltage, Dual SPDT Analog Switches in UCSP
MAX4684EUB+T ,0.5Ω/0.8Ω Low-Voltage, Dual SPDT Analog Switches in UCSPApplications Ordering InformationSpeaker Headset Switching PIN/B U M P- TOPPART TEMP RANGEMARKMP3 ..

MAX1817EUB+
Compact, High-Efficiency, Dual-Output, Step-Up DC-DC Converter
General Description
The MAX1817 is a compact, high-efficiency, dual-out-
put step-up converter for portable devices that pro-
vides both the main logic supply and the LCD bias. The
device operates from an input voltage of +1.5V to
+5.5V, allowing the use of 2- or 3-cell alkaline batteries,
or 1-cell lithium-ion (Li+) batteries.
The MAX1817’s main regulator supplies 125mA at
either a preset 3.3V or an adjustable 2.5V to 5.5V out-
put voltage with up to 88% efficiency. A 0.1µA shut-
down state also minimizes battery drain. The
MAX1817’s secondary step-up converter provides the
LCD bias voltage and is adjustable up to +28V.
Other features include a fast switching frequency to
reduce the size of external components and a low qui-
escent current to maximize battery life. Both outputs can
be independently shut down for improved flexibility.
The MAX1817 is supplied in a compact 10-pin µMAX
package. The MAX1817 evaluation kit (MAX1817EVKIT)
is available to speed up design.
________________________Applications
Organizers/Translators
PDAs
MP3 Players
GPS Receivers
FeaturesDual Step-Up Converter in a Tiny 10-Pin µMAX
Package Main Output
Up to 125mA Load Current
Fixed 3.3V or Adjustable 2.5V to 5.5V
Up to 88% Efficiency
Internal SwitchLCD Output
Up to 28V for LCD Bias
Internal SwitchInput Voltage Range +1.5V to +5.5VMinimal External Components Required0.1µA Logic-Controlled ShutdownLow 15µA Quiescent Supply Current
MAX1817
Compact, High-Efficiency, Dual-Output
Step-Up DC-DC Converter
OUT
GND
LXLCDFBLCD
ONLCD
MAX1817
μMAX
TOP VIEW
N.C.AGND
Pin Configuration
MAX1817
ONLCD
OUT
FBLCDLCD ON/OFF
+1.5V
TO +5.5V
MAIN ON/OFFMAIN
LCD
AGNDGND
LXLCDypical Operating Circuit
19-1794 Rev 0; 10/00
Ordering InformationPART TEMP. RANGE PIN-PACKAGE
MAX1817EUB-40°C to +85°C10 µMAX
MAX1817
Compact, High-Efficiency, Dual-Output
Step-Up DC-DC Converter
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VON= VONLCD =VOUT= +3.3V, FB = GND, 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.
OUT to GND.............................................................-0.3V to +6V
ON, ONLCD, FB, FBLCD, LX to GND......-0.3V to (VOUT+ 0.3V)
LXLCD to GND.......................................................-0.3V to +30V
AGND to GND.......................................................-0.3V to +0.3V
Continuous Power Dissipation (TA= +70°C)
10-Pin µMAX (derate 5.6mW/°C above +70°C)...........444mW
LXLCD, LX Maximum Current........................................0.5ARMS
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
PARAMETERCONDITIONSMINTYPMAXUNITS
GENERAL
Input Voltage Range1.55.5V
RLOAD = 35Ω1.5Startup VoltageRLOAD = ∞, VFB = 1.35V1.21.55V
Quiescent Current from OUT
(Main Only)
VFB = VFBLCD = 1.35V,
VONLCD = 0510µA
Quiescent Current from OUTVFB = VFBLCD = 1.35V1530µA
Shutdown Quiescent CurrentVON = VONLCD = 00.11µA
MAIN OUTPUT
VOUT rising, VFB = 1.35V2.22.4OUT Undervoltage LockoutVOUT falling, VFB = 1.35V1.952.15V
Fixed-Mode Output VoltageVFB ≤ 45mV3.143.33.47V
Adjustable-Mode FB Regulation
Voltage1.201.251.30V
FB Input Bias CurrentVFB = 1.35V50nA
FB Dual ModeTM Threshold4575105mV
Output Voltage Adjustment
Range2.55.5V
Maximum LX On-TimeVFB = 0.5V2.457.5µs
Zero Crossing Comparator
Threshold (VLX - VOUT)02040mV
Zero Crossing Comparator
Backup TimerVFB = +0.5V224570µs
Line RegulationIOUT = 100mA,
VIN = +2V to +3V1.6%
Load RegulationVIN = +2.5V,
ILOAD = 10mA to 100mA1.6%
LX On-ResistanceVOUT = 3.3V, ILX = 100mA0.350.65Ω
LX Current Limit0.50.751.05A
Dual Mode is a trademark of Maxim Integrated Products.
MAX1817
Compact, High-Efficiency, Dual-Output
Step-Up DC-DC Converter
ELECTRICAL CHARACTERISTICS (continued)
(VON= VONLCD = VOUT= +3.3V, FB = GND, TA= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETERCONDITIONSMINTYPMAXUNITS
LX Leakage CurrentVON = GND, VLX = 5.5V0.11µA
ON Input Low Voltage1.8V < VOUT < 5.5V, VFB = 0.5V400mV
ON Input High Voltage1.8V < VOUT < 5.5V, VFB = 0.5V1.6V
ON Input Bias Current1µA
LCD OUTPUT
LXLCD Voltage28V
LXLCD On-ResistanceVOUT = 3.3V, ILXLCD = 100mA1.12.0Ω
LXLCD Current Limit0.280.50.7A
LXLCD Leakage CurrentVLXLCD = 28V, VONLCD = 00.11µA
FBLCD Regulation Voltage1.201.251.30V
FBLCD Input Bias CurrentVFBLCD = 1.35V50nA
LCD Line RegulationILOAD = 5mA, VIN = +2V to +3V0.1%
LCD Load RegulationILOAD = 1mA to 5mA, VIN = +2.5V0.5%
Maximum LXLCD On-Time4914µs
VFBLCD ≥ 1.2V0.511.5Minimum LXLCD Off-TimeVFBLCD ≤ 0.7V2.457.5µs
ONLCD Input Low Voltage2.5V < VOUT < 5.5V400mV
ONLCD Input High Voltage2.5V < VOUT < 5.5V1.6V
ONLCD Input Bias Current1µA
ELECTRICAL CHARACTERISTICS
(VON= VONLCD = VOUT= +3.3V, FB = GND, TA= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETERCONDITIONSMINMAXUNITS
GENERAL
Input Voltage Range1.55.5V
Startup VoltageRLOAD = ∞, VFB = 1.35V1.7V
Quiescent Current from OUT
(Main Only)VFB = VFBLCD = 1.35V, VONLCD = 010µA
Quiescent Current from OUTVFB = VFBLCD = 1.35V30µA
Shutdown Quiescent CurrentVON = VONLCD = 01µA
MAIN OUTPUT
VOUT rising, VFB = 1.35V2.4OUT Undervoltage LockoutVOUT falling, VFB = 1.35V1.95V
Fixed-Mode Output VoltageVFB ≤ 45mV3.143.47V
Adjustable-Mode FB Regulation
Voltage1.201.30V
FB Input Bias CurrentVFB = 1.35V50nA
MAX1817
Compact, High-Efficiency, Dual-Output
Step-Up DC-DC Converter
ELECTRICAL CHARACTERISTICS (continued)
(VON= VONLCD = VOUT= +3.3V, FB = GND, TA= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETERCONDITIONSMINMAXUNITS
FB Dual Mode Threshold45105mV
Outp ut V ol tag e Ad j ustm ent Rang e2.55.5V
Maximum LX On-TimeVFB = 0.5V2.47.5µs
Zero Crossing Comparator
Threshold (VLX - VOUT)040mV
Zero Crossing Comparator
Backup TimerVFB = 0.5V2270µs
LX On-ResistanceVOUT = 3.3V, ILX = 100mA0.65Ω
LX Current Limit0.421.05A
LX Leakage CurrentVON = GND, VLX = 5.5V1µA
ON Input Low Voltage1.8V < VOUT < 5.5V, VFB = 0.5V400mV
ON Input High Voltage1.8V < VOUT < 5.5V, VFB = 0.5V1.6V
ON Input Bias Current1µA
LCD OUTPUT
LXLCD Voltage28V
LXLCD On-ResistanceVOUT = 3.3V, ILXLCD = 100mA2Ω
LXLCD Current Limit0.250.7A
LXLCD Leakage CurrentVLXLCD = 28V, VONLCD = 01µA
FBLCD Regulation Voltage1.201.30V
FBLCD Input Bias CurrentVFBLCD = 1.35V70nA
Maximum LXLCD On-Time414µs
VFBLCD ≥ 1.2V0.51.5Minimum LXLCD Off-TimeVFBLCD ≤ 0.7V2.27.5µs
ONLCD Input Low Voltage2.5V < VOUT < 5.5V400mV
ONLCD Input High Voltage2.5V < VOUT < 5.5V1.6V
ONLCD Input Bias Current1µA
Note 1:Specifications to -40°C are guaranteed by design and not production tested.
MAX1817
Compact, High-Efficiency, Dual-Output
Step-Up DC-DC Converter
MAIN OUTPUT EFFICIENCY
vs. LOAD CURRENT
MAX1817-01
LOAD CURRENT (mA)
EFFICIENCY (%)
A: VIN = 3.3V,
VOUT = 5V
B: VIN = 2.4V,
VOUT = 5V
C: VIN = 2.4V,
VOUT = 3.3V
D: VIN = 1.8V,
VOUT = 5V
E: VIN = 1.8V,
VOUT = 3.3V
CIRCUIT OF FIGURE 2
LCD OUTPUT EFFICIENCY
vs. LOAD CURRENT
MAX1817-02
LOAD CURRENT (mA)
EFFICIENCY (%)45
A: VIN = +2.4V, VLCD = 12V
B: VIN = +2.4V, VLCD = 18V
C: VIN = +2.4V, VLCD = 24V
D: VIN = +1.8V, VLCD = 12V
E: VIN = +1.8V, VLCD = 18V
F: VIN = +1.8V, VLCD = 24V
VOUT = 3.3V,
NO LOADBCEF
STARTUP VOLTAGE vs. LOAD CURRENT
MAX1817 toc03
STARTUP VOLTAGE (V)
LOAD CURRENT (mA)
RESISTIVE LOAD
LCD OFF
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE (LCD OFF)
MAX1817 toc04
INPUT VOLTAGE (V)
SUPPLY CURRENT (
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX1817-05
INPUT VOLTAGE (V)
SUPPLY CURRENT (
VOUT = 3.3V
VLCD = 18V, NO LOAD
R1 = 1MΩ, R2 = 75kΩ
10μs/div
MAIN CONVERTER
SWITCHING WAVEFORM
MAX1817-06
A: ILX, 500mA/div
B: VOUT, 50mV/div, AC-COUPLED
C: VLX, 5V/div
VIN = 2.4V, VOUT = 3.3V, ILOAD,OUT = 50mA, VONLCD = 0
4μs/div
LCD CONVERTER
SWITCHING WAVEFORM
MAX1817-07
A: ILXLCD, 500mA/div
B: VLCD, 100mV/div, AC-COUPLED
C: VLXLCD, 10V/div
VIN = 2.4V, VOUT = 3.3V, ILOAD,OUT = 0,
VLCD = 18V, ILOAD,LCD = 5mA
Typical Operating Characteristics
(Circuit of Figure 3, TA = +25°C, unless otherwise noted.)
MAX1817
Compact, High-Efficiency, Dual-Output
Step-Up DC-DC Converter
Typical Operating Characteristics (continued)
(Circuit of Figure 3, TA= +25°C, unless otherwise specified)
400μs/div
MAIN LOAD TRANSIENT RESPONSE
MAX1817-08
A: VOUT, 100mV/div, AC-COUPLED
B: ILOAD, OUT, 50mA/div
VIN = 2.4V, VOUT = 3.3V
200μs/div
LCD LOAD TRANSIENT RESPONSE
MAX1817-09
A: VLCD, 50mV/div, AC-COUPLED
B: ILOAD, OUT, 10mA/div
VIN = 2.4V, VOUT = 3.3V (NO LOAD), VLCD = 18V
400μs/div
MAIN LINE TRANSIENT RESPONSE
MAX1817-10
A: VOUT, 100mV/div, AC-COUPLED
B: VIN, 1V/div
VOUT = 3.3V, ILOAD,MAIN = 20mA, VONLCD = 0
2.4V
1.8V
200μs/div
LCD LINE TRANSIENT RESPONSE
MAX1817-11
A: VLCD, 100mV/div, AC-COUPLED
B: VIN, 1V/div
VOUT = 3.3V (NO LOAD), VLCD = 18V, ILOAD,LCD = 2mA
2.4V
1.8V
100μs/div
MAIN OUTPUT TURN-ON/TURN-OFF
RESPONSE
MAX1817-12
A: VOUT, 2V/div
B: IIN, 500mA/div
C: VON, 5V/divC
400μs/div
LCD OUTPUT TURN-ON/TURN-OFF
RESPONSE
MAX1817-13
A: VLCD, 10V/div
B: IIN, 200mA/div
C: VONLCD, 5V/div

Partno	Mfg	Dc	Qty	Available	Descript
MAX1817EUB+ \|MAX1817EUB	MAXIM	N/a	410	avai	Compact, High-Efficiency, Dual-Output, Step-Up DC-DC Converter