MAX5025EUT+T-MAX5026EUT+-MAX5026EUT+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX5025EUT+T ,500kHz, 36V Output, SOT23, PWM Step-Up DC-DC ConvertersELECTRICAL CHARACTERISTICS(V = 5V, SHDN = V , T = -40°C to +85°C, unless otherwise noted. Typical v ..
MAX5026EUT ,RELIABILITY REPORT FOR MAX5026EUT PLASTIC ENCAPSULATED DEVICES MAX5026EUT Rev. A RELIABILITY REPORT FOR MAX5026EUT PLASTIC ENCA ..
MAX5026EUT+ ,500kHz, 36V Output, SOT23, PWM Step-Up DC-DC ConvertersApplications♦ Small, 6-Pin SOT23 PackageTV Tuner Power SupplyLow-Noise Varactor Diode BiasingOrderi ..
MAX5026EUT+T ,500kHz, 36V Output, SOT23, PWM Step-Up DC-DC ConvertersFeaturesThe MAX5025–MAX5028 constant-frequency, pulse-♦ Input Voltage Range:width modulating (PWM), ..
MAX5026EUT-T ,500kHz / 36V Output / SOT23 / PWM Step-Up DC-DC ConvertersApplications Small, 6-Pin SOT23 PackageTV Tuner Power SupplyLow-Noise Varactor Diode BiasingOrderi ..
MAX5026EUT-T ,500kHz / 36V Output / SOT23 / PWM Step-Up DC-DC ConvertersFeaturesThe MAX5025–MAX5028 constant-frequency, pulse- Input Voltage Range:width modulating (PWM), ..
MAX9207EAI+ ,10-Bit Bus LVDS SerializersFeaturesThe MAX9205/MAX9207 serializers transform 10-bit-♦ Standalone Serializer (vs. SERDES) Ideal ..
MAX9207EAI+T ,10-Bit Bus LVDS SerializersApplicationsThe MAX9205/MAX9207 transmit serial data at speeds♦ Wide Reference Clock Input Rangeup ..
MAX9208EAI+T ,10-Bit Bus LVDS DeserializersApplicationsMAX9206EAI/V+ -40°C to +85°C 28 SSOP 16 to 40Cellular Phone Base DSLAMsStationsMAX9208E ..
MAX9208EAI+T ,10-Bit Bus LVDS DeserializersFeaturesThe MAX9206/MAX9208 deserializers transform a high-♦ Stand-Alone Deserializer (vs. SerDes) ..
MAX9209EUM+D ,Programmable DC-Balanced 21-Bit SerializersApplications♦ Low-Profile 48-Lead TSSOP and Space-SavingAutomotive Navigation SystemsTQFN PackagesA ..
MAX9209EUM+TD ,Programmable DC-Balanced 21-Bit SerializersMAX9209/MAX921319-2828; Rev 5; 3/12Programmable DC-Balanced 21-Bit Serializers

MAX5025EUT+T-MAX5026EUT+-MAX5026EUT+T
500kHz, 36V Output, SOT23, PWM Step-Up DC-DC Converters
General Description
The MAX5025–MAX5028 constant-frequency, pulse-
width modulating (PWM), low-noise boost converters
are intended for low-voltage systems that often need a
locally generated high voltage. These devices are
capable of generating low-noise, high output voltages
required for varactor diode biasing in TV tuners, set-top
boxes, and PCI cable modems. The MAX5025–
MAX5028 operate from as low as 3V and switch at
500kHz.
The constant-frequency, current-mode PWM architec-
ture provides for low output noise that is easy to filter. A
40V lateral DMOS device is used as the internal power
switch, making the devices ideal for boost converters
up to 36V. The MAX5025/MAX5026 adjustable versions
require the use of external feedback resistors to set the
output voltage. The MAX5027/MAX5028 offer a fixed
30V output. These devices are available in a small, 6-
pin SOT23 package.
Applications
TV Tuner Power Supply
Low-Noise Varactor Diode Biasing
Set-Top Box Tuner Power Supply
PCI Cable Modem
Voice-Over-Cable
LCD Power Supply
Avalanche Photodiode Biasing
FeaturesInput Voltage Range:
3V to 11V (MAX5026/MAX5028)
4.5V to 11V (MAX5025/MAX5027)Wide Output Voltage Range: VCCto 36VOutput Power: 120mW (max)User-Adjustable Output Voltage with
MAX5025/MAX5026 Using External Feedback
ResistorsFixed 30V Output Voltage: MAX5027/MAX5028Internal 1.3Ω(typ), 40V SwitchConstant PWM Frequency Provides Easy Filtering
in Low-Noise Applications500kHz (typ) Switching Frequency1µA (max) Shutdown CurrentSmall, 6-Pin SOT23 Package
MAX5025–MAX5028
500kHz, 36V Output, SOT23,
PWM Step-Up DC-DC Converters
GNDLX
5VCC
PGND
MAX5025–
MAX5028
SOT23-6
TOP VIEWSHDN
Pin Configuration
VOUT
30VC2VCC = 4.5V TO 11V
(MAX5027)
VCC = 3V TO 11V
(MAX5028)D1
VCC
GND
PGND
MAX5027
MAX5028
SHDN
Typical Operating Circuit
19-2239; Rev 2; 3/09
EVALUATION KIT
AVAILABLE
Ordering Information
PA RT TEMP RANGEPIN- PACK AGE
MAX5025EUT-T-40°C to +85°C 6 SOT23-6
MAX5026EUT-T-40°C to +85°C 6 SOT23-6
MAX5027EUT-T-40°C to +85°C 6 SOT23-6
MAX5028EUT-T-40°C to +85°C 6 SOT23-6
Selector Guide appears at end of data sheet.
MAX5025–MAX5028
500kHz, 36V Output, SOT23,
Step-Up DC-DC Converters
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC= 5V, SHDN= VCC, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
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.
VCCto GND............................................................-0.3V to +12V
PGND to GND.......................................................-0.1V to +0.1V
FB to GND (MAX5025/MAX5026)...............-0.3V to (VCC+ 0.3V)
FB to GND (MAX5027/MAX5028)...........................-0.3V to +40V
SHDNto GND.............................................-0.3V to (VCC+ 0.3V)
LX to GND..............................................................-0.3V to +45V
Peak LX Current................................................................600mA
Operating Temperature Range...........................-40°C to +85°C
Continuous Power Dissipation (TA= +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C)..........695.7mW
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +165°C
Lead Temperature (soldering 10s)..................................+300°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
SUPPLY VOLTAGE
MAX5026/MAX50283.011Input Voltage RangeVCCMAX5025/MAX50274.511V
Undervoltage LockoutVUVLORise/fall, hysteresis = 3mV2.252.652.95V
Supply CurrentICCMAX5025/MAX5026, FB = 1.4V
MAX5027/MAX5028, FB = 35V3501000µA
Shutdown CurrentISHDNSHDN = GND0.011µA
BOOST CONVERTER
MAX5025/MAX50273455001000Switching FrequencyfSWMAX5026/MAX5028, VCC = 3.3V410500670kHz
MAX5025/MAX5027,
ILOAD = 2mA, VCC = 4.5V to 11V,
VOUT = 30V
Line Regulation
MAX5026/MAX5028,
ILOAD = 0.5mA, VCC = 3V to 11V,
VOUT = 30V
%/V
MAX5025/MAX5027,
VCC = 5V, ILOAD = 0 to 4mA,
VOUT = 30V
Load Regulation
MAX5026/MAX5028,
VCC = 3.3V, ILOAD = 0 to 1mA,
VOUT = 30V
Thermal Shutdown140°C
Thermal Shutdown Hysteresis2°C
MAX5025–MAX5028
ELECTRICAL CHARACTERISTICS (continued)
(VCC= 5V, SHDN= VCC, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
MAX5025, VCC = 4.5V to 11V1.191.251.31
MAX5027, VCC = 4.5V to 11V28.530.031.5
MAX5026, VCC = 3.3V to 11V1.2121.251.288FB Set PointVFB
MAX5028, VCC = 3.3V to 11V29.03031
MAX5025/MAX5026, FB = 1V110310nAFB Input Bias CurrentIFBMAX5027/MAX5028, FB = 30V100170µA
Output Voltage
Adjustment RangeMAX5025/MAX5026VCC + 136V
LX OUTPUT
MAX5026/MAX5028,
VCC = 3V2.04.0
VCC = 5V1.33.0LX On-ResistanceRONILX = 40mA
VCC = 11V1.02.5
Switch Current LimitILIMNote 2260mA
MAX5025/MAX5026,
VFB = 1.4V
LX Leakage CurrentVLX = 40V
MAX5027/MAX5028,
VFB = 35V
0.0110µA
LOGIC INPUT: SHDN
Input Low LevelVIL0.8V
Input High LevelVIH2.4V
Input Bias Current-11µA
Note 1:All devices are 100% production tested at TA= +25°C. All temperature limits are guaranteed by design.
Note 2:Switch current-limit accuracy is typically ±20% and is a function of the input voltage. ILIM= (VIN/5) (260mA).
500kHz, 36V Output, SOT23,
Step-Up DC-DC Converters
MAX5025–MAX5028
500kHz, 36V Output, SOT23,
Step-Up DC-DC Converters46810
MAX5025-28 toc01
LOAD CURRENT (mA)
EFFICIENCY (%)
EFFICIENCY vs. LOAD CURRENT
(VOUT = 12V)
MAX5026
VCC = 5V,
VOUT = 12V
CIRCUIT OF FIGURE 2.
R1 = 147kΩ, R2 = 16.2kΩ268
MAX5025-28 toc02
LOAD CURRENT (mA)
EFFICIENCY (%)
EFFICIENCY vs. LOAD CURRENT
(VOUT = 15V)
MAX5026
VCC = 5V,
VOUT = 12V
CIRCUIT OF FIGURE 2.
R1 = 147kΩ, R2 = 13kΩ2345
MAX5025-28 toc03
LOAD CURRENT (mA)
EFFICIENCY (%)
EFFICIENCY vs. LOAD CURRENT
(VOUT = 24V)
MAX5026
VCC = 5V,
VOUT = 24V
CIRCUIT OF FIGURE 2.
R1 = 147kΩ, R2 = 8.07kΩ
MAX5025-28 toc04
LOAD CURRENT (mA)
EFFICIENCY (%)
EFFICIENCY vs. LOAD CURRENT
(VOUT = 30V)
MAX5026
VCC = 5V,
VOUT = 30V
CIRCUIT OF FIGURE 2.
R1 = 147kΩ, R2 = 6.34kΩ
MAX5025-28 toc05
LOAD CURRENT (mA)
STARTUP VOLTAGE (V)
MAX5026 MINIMUM STARTUP VOLTAGE
vs. LOAD CURRENT
MAX5025-28 toc06
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
MAX5026/MAX5028
SUPPLY CURRENT vs. SUPPLY VOLTAGE
CURRENT INTO VCC PIN
DEVICE NOT SWITCHING
MAX5025-28 toc07
NO LOAD SUPPLY CURRENT (mA)
MAX5026
NO LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGE
CIRCUIT OF FIGURE 2
VOUT = 30V
SUPPLY CURRENT vs. TEMPERATURE
MAX5025-28 toc08
SUPPLY CURRENT (
CURRENT INTO VCC PIN
VCC = 11V
VCC = 9V
VCC = 7V
VCC = 5V
VCC = 3V
MAX5025-28 toc09
SWITCHING FREQUENCY (kHz)
MAX5026
SWITCHING FREQUENCY vs. TEMPERATURE
VCC = 5V
VOUT = 30V
CIRCUIT OF FIGURE 2.ypical Operating Characteristics
(VCC= 5V, VOUT= 30V, TA= +25°C, unless otherwise noted.)
MAX5025–MAX5028
Typical Operating Characteristics (continued)
(VCC= 5V, VOUT= 30V, TA= +25°C, unless otherwise noted.)
500kHz, 36V Output, SOT23,
Step-Up DC-DC Converters
EXITING SHUTDOWN
MAX5025-28 toc10
OUTPUT
VOLTAGE
20V/div
INDUCTOR
CURRENT
50mA/div
SHUTDOWN
VOLTAGE
5V/div
30V
2ms/div
MAX5026, VCC = 5V, VOUT = 30V, ILOAD = 1mA.
CIRCUIT OF FIGURE 3
ENTERING SHUTDOWN
MAX5025-28 toc11
30V
OUTPUT
VOLTAGE
20V/div
SHUTDOWN
VOLTAGE
5V/div
100ms/div
MAX5026, VCC = 5V, VOUT = 30V, ILOAD = 1mA.
CIRCUIT OF FIGURE 3
MAX5025-28 toc12
LX PIN
20V/div
VOUT
2mV/div
AC-COUPLED
100mA/div
0mA
1μs/div
MAX5026, VCC = 5V, VOUT = 30V, ILOAD = 0.1mA.
CIRCUIT OF FIGURE 2
LIGHT-LOAD SWITCHING WAVEFORM
WITHOUT RC FILTER
MAX5025-28 toc13
LX PIN
20V/div
VOUT
1mV/div
AC-COUPLED
100mA/div
0mA
1μs/div
MAX5026, VCC = 5V, VOUT = 30V, ILOAD = 0.1mA.
CIRCUIT OF FIGURE 3
LIGHT-LOAD SWITCHING WAVEFORM
WITH RC FILTER
MAX5025-28 toc14
LX PIN
20V/div
VOUT
5mV/div
AC-COUPLED
200mA/div
0mA
1μs/div
MAX5026, VCC = 5V, VOUT = 30V, ILOAD = 2mA.
MEDIUM-LOAD SWITCHING WAVEFORM
WITHOUT RC FILTER
MAX5025-28 toc15
LX PIN
20V/div
VOUT
1mV/div
AC-COUPLED
200mA/div
0mA
1μs/div
MAX5026, VCC = 5V, VOUT = 30V, ILOAD = 2mA.
CIRCUIT OF FIGURE 3
MEDIUM-LOAD SWITCHING WAVEFORM
WITH RC FILTER
MAX5025–MAX5028
500kHz, 36V Output, SOT23,
Step-Up DC-DC Converters
Typical Operating Characteristics (continued)
(VCC= 5V, VOUT= 30V, TA= +25°C, unless otherwise noted.)
MAX5025-28 toc17
LX PIN
20V/div
VOUT
1mV/div
AC-COUPLED
200mA/div
0mA
1μs/div
MAX5026, VCC = 5V, VOUT = 30V, ILOAD = 4mA.
CIRCUIT OF FIGURE 3
HEAVY-LOAD SWITCHING WAVEFORM
WITH RC FILTER
LOAD TRANSIENT RESPONSE
MAX5025-28 toc18
OUTPUT
VOLTAGE
200mV/div
AC-COUPLED
LOAD
CURRENT
10mA/div
0mV
0mA
1ms/div
MAX5026, VCC = 5V, VOUT = 30V, ILOAD = 0 TO 4mA.
CIRCUIT OF FIGURE 2
LINE TRANSIENT RESPONSE
MAX5025-28 toc19
OUTPUT
VOLTAGE
1mV/div
AC-COUPLED
INPUT
VOLTAGE
100mV/div
AC-COUPLED
0mV
0mV
2ms/div
MAX5026, VCC = 5V TO 5.2V, VOUT = 30V, ILOAD = 1mA.
CIRCUIT OF FIGURE 2
MAX5025-28 toc20
FB PIN VOLTAGE (V)
MAX5026
FB PIN VOLTAGE vs. TEMPERATURE
VCC = 11V
VCC = 5V
VCC = 3V
MAX5025-28 toc21
FB PIN VOLTAGE (V)
MAX5028
FB PIN VOLTAGE vs. TEMPERATURE
VCC = 11V
VCC = 5V
VCC = 3V
MAX5025-28 toc16
LX PIN
20V/div
VOUT
5mV/div
AC-COUPLED
200mA/div
0mA
1μs/div
MAX5026, VCC = 5V, VOUT = 30V, ILOAD = 4mA.
CIRCUIT OF FIGURE 2
HEAVY-LOAD SWITCHING WAVEFORM
WITHOUT RC FILTER
MAX5025–MAX5028
500kHz, 36V Output, SOT23,
Step-Up DC-DC Converters
MAX5025-28 toc23
TEMPERATURE (°C)
LX LEAKAGE CURRENT (
LX LEAKAGE CURRENT vs. TEMPERATURE
CURRENT INTO LX PIN
VLX = 40V1345
LOAD REGULATION
MAX5025-28 toc24
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
MAX5026
VCC = 5V
WITH RC FILTER
(CIRCUIT OF FIGURE 3)
WITHOUT RC FILTER
(CIRCUIT OF FIGURE 2)
MAX5025-28 toc25
INPUT VOLTAGE (V)
MAXIMUM LOAD CURRENT (mA)
MAX5026
MAXIMUM LOAD CURRENT
vs. INPUT VOLTAGE75
A: VOUT = 12V
B: VOUT = 24V
C: VOUT = 30V
D: VOUT = 32V
E: VOUT = 36VD
Typical Operating Characteristics (continued)
(VCC= 5V, VOUT= 30V, TA= +25°C, unless otherwise noted.)
MAX5025-28 toc22
TEMPERATURE (°C)
SWITCH ON-RESISTANCE
vs. TEMPERATURE
VCC = 3V
VCC = 5V
VCC = 11V
MAX5026

Partno	Mfg	Dc	Qty	Available	Descript
MAX5026EUT+	MAIXM	N/a	2500	avai	500kHz, 36V Output, SOT23, PWM Step-Up DC-DC Converters
MAX5025EUT+T \|MAX5025EUTT	MAXIM	N/a	3942	avai	500kHz, 36V Output, SOT23, PWM Step-Up DC-DC Converters
MAX5026EUT+T	MAXIM	N/a	593	avai	500kHz, 36V Output, SOT23, PWM Step-Up DC-DC Converters