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Maxim > Solutions > PDAs and Handheld Equipment

Power Management - Single Output Step-Down (Buck) Switchmode Regulators

DATA SHEETS
Display Title / Parts Key Advantages
QV  PDF High-Efficiency, Seamless Transition, Step-Up/Down DC-DC Converter
MAX8625A

Glitch-Free, Smooth Step-Up/Down Transition H-Bridge Converter
QV  PDF Tiny 500mA, 4MHz/2MHz Synchronous Step-Down DC-DC Converters
MAX8640Y, MAX8640Z

Smallest 2mm x 2.1mm SC70 Package, the Industry's Smallest Total Solution Size, and Most Robust 4MHz/2MHz Step-Down DC-DC Converters on the Market that Can Deliver 500mA with Over 93% Efficiency
QV  PDF 2.5MHz/1.5MHz Step-Down Converters with 60mohm Bypass in TDFN for CDMA PA Power
MAX8581, MAX8582

Overall Smallest Solution 1.5MHz Step-Down DC-DC Converters Deliver 600mA with Up to 94% Efficiency in a Small TDFN Package
QV  PDF 16µA IQ, 1.2A PWM Step-Down DC-DC Converters
MAX1556, MAX1557

4 LDOs and LCD step-up DC-DC
QV  PDF 4MHz, 500mA Synchronous Step-Down DC-DC Converters in Thin SOT and TDFN
MAX8560, MAX8561, MAX8562

First 4MHz Step-Down DC-DC Converters Deliver 500mA with Over 90% Efficiency in SOT23 and TDFN
QV  PDF 800mA, 2MHz, PWM DC-to-DC Step-Down Converter with Reset
MAX1572

First 800mA, Sub-1V, 2MHz, PWM, Step-Down DC-DC Uses Tiny 2.2µH Inductor, Includes Reset Output
QV  PDF Low-Output-Voltage, 800mA, PWM Step-Down DC-DC Converters
MAX1927, MAX1928

QV  PDF Low-Voltage, 400mA Step-Down DC-DC Converters in SOT23
MAX1920, MAX1921

QV  PDF WCDMA Cellular Phone 600mA Buck Regulators
MAX1820, MAX1820Y, MAX1820Z, MAX1821, MAX1821X

QV  PDF Low-Voltage, Step-Down DC-DC Converters in SOT23
MAX1733, MAX1734

High-Efficiency DC-DC Solution for Low-Voltage Logic Supplies
QV  PDF Low-Noise, 5.5V Input, PWM Step-Down Regulator
MAX1692

0.6A output



Key Specifications:   Switch-Mode DC-DC Power Supplies
Part Number Topology VIN (min) (V) VIN (max) (V) Number of DC-DC Outputs Preset VOUT (V) Digital/VID Programmed Output Min. Adjustable VOUT (V) Max. Adjustable VOUT (V) IOUT (A) Operating Current, ICC (max) (mA) Fixed Freq/PWM Operation Operating Freq. (kHz) Internal Power Switch(es) Synchronous Rectifier Package Smallest Available Package (max w/pins) (mm2)
MAX8625  NEW! Step-Up/Down 2.5 5.5 1 3.3 No 1.25 4 0.8 0.045 Yes 1000 Yes Yes THIN QFN (Dual)/14  - 
MAX8581  Step-Down 2.7 5.5 1  -  No 0 5 0.6 4 Yes 2500 Yes Yes THIN QFN (Dual)/10  - 
MAX8582  Step-Down 2.7 5.5 1  -  No 0 5 0.6 4 Yes 1500 Yes Yes THIN QFN (Dual)/10  - 
MAX8640Y  Step-Down 2.7 5.5 1 1.1
1.2
1.3
1.5
1.8
2.5
No  -   -  0.5 0.048 Yes 2000 Yes Yes MicroDFN/6
SC-70/6
2
MAX8640Z  Step-Down 2.7 5.5 1 1.1
1.2
1.3
1.5
1.8
No  -   -  0.5 0.048 Yes 4000 Yes Yes MicroDFN/6
SC-70/6
2
MAX8560  Step-Down 2.7 5.5 1  -  No 0.6 2.5 0.5 0.08 Yes  -  Yes Yes SOT-23/5  - 
MAX8561  Step-Down 2.7 5.5 1  -  No 0.6 2.5 0.5 0.08 Yes  -  Yes Yes THIN QFN (Dual)/8  - 
MAX8562  Step-Down 2.7 5.5 1  -  No 0.6 2.5 0.5 0.08 Yes  -  Yes Yes THIN QFN (Dual)/8  - 
MAX1556  Step-Down 2.6 5.5 1 1.8
2.5
3.3
No 0.75 5.5 1.2 0.016 Yes 1000 Yes Yes THIN QFN (Dual)/10  - 
MAX1557  Step-Down 2.6 5.5 1 1.3
1.5
No 0.75 5.5 0.6 0.016 Yes 1000 Yes Yes THIN QFN (Dual)/10  - 
MAX1572  Step-Down 2.6 5.5 1  -  Yes 0.75 2.5 0.8 0.08 Yes 2000 Yes Yes THIN QFN/12  - 
MAX1927  Step-Down 2.6 5.5 1  -  No 0.75 5 1 0.24 Yes 1000 Yes Yes uMAX/10 15
MAX1928  Step-Down 2.6 5.5 1 1.5
1.8
2.5
No  -   -  1 0.24 Yes 1000 Yes Yes uMAX/10 15
MAX1920  Step-Down 2 5.5 1  -  No 1.25 4 0.4 0.07 No 1200 Yes Yes SOT-23/6
THIN QFN (Dual)/6
9
MAX1921  Step-Down 2 5.5 1 1.5
1.8
2.5
3.3
No  -   -  0.4 0.07 No 1200 Yes Yes SOT-23/6 9
MAX1820  Step-Down 2.6 5.5 1  -  No 0.4 3.5 0.6 0.36 Yes 1000 Yes Yes UCSP/12
uMAX/10
3
MAX1821  Step-Down 2.6 5.5 1  -  No 1.25 5.5 0.6 0.36 Yes 1000 Yes Yes uMAX/10 15
MAX1733  Step-Down 2.7 5.5 1  -  No 1.25 2 0.25 0.07 No 1200 Yes Yes SOT-23/5 9
MAX1734  Step-Down 2.7 5.5 1 1.5
1.8
No  -   -  0.25 0.07 No 1200 Yes Yes SOT-23/5 9
MAX1692  Step-Down 2.7 5.5 1  -  No 1.25 5.5 0.6 0.14 Yes 750 Yes Yes uMAX/10 15
See All Switch-Mode DC-DC Power Supplies (417)




         



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