MAX771ESA+ Maxim Integrated Products, MAX771ESA+ Datasheet - Page 19

• Manufacturer Part Number: MAX771ESA+
• Description: IC CNTRLR DC-DC 8-SOIC
• Manufacturer: Maxim Integrated Products
• Type: Step-Up (Boost)r

Specifications of MAX771ESA+

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 12V, Adj
• Current - Output: 1A
• Frequency - Switching: 300kHz
• Voltage - Input: 2 ~ 16.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Power - Output: 471mW
• Output Voltage: 12 V or 3 V (Min)
• Output Current: 1 A (Max)
• Input Voltage: 2 V to 16.5 V
• Supply Current: 110 uA
• Switching Frequency: 300 KHz
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The Typical Operating Characteristics show the Start-
Up Voltage vs. Load Current graph for bootstrapped-
mode operation. This graph depends on the type
of power switch used. The MAX770–MAX773 are
not designed to start up under full load in boot-
strapped mode with low input voltages.
Due to high current levels and fast switching wave-
forms, which radiate noise, proper PC board layout is
essential. Protect sensitive analog grounds by using a
star ground configuration. Minimize ground noise by
connecting GND, the input bypass capacitor ground
Table 2. Component Suppliers
SUPPLIER
Coiltronics
Matsuo
Nichicon
Nihon
Renco
Sanyo
Sumida
United Chemi-Con
Zetex
Surface Mount
Through Hole
PRODUCTION
5V/12V/15V or Adjustable, High-Efficiency,
______________________________________________________________________________________
Sumida
Coiltronics
Sumida
Renco
CD54 series
CDR125 series
CTX20 series
RCH855 series
RCH110 series
RL1284-18
USA: [phone]
USA: [phone]
Japan: 81-6-337-6450
USA: [phone]
USA: [phone]
USA: [phone]
USA: [phone]
Japan: 81-7-2070-6306
USA: [phone]
Japan: 81-3-3607-5111
USA: [phone]
USA: [phone]
UK: 44-61-627-4963
INDUCTORS
Starting Up under Load
PHONE
Layout Considerations
Low I
Matsuo
Sprague
Sanyo
Nichicon
United Chemi-Con
267 series
595D series
OS-CON series
PL series
LXF series
CAPACITORS
[phone]
[phone]
81-6-337-6456
[phone]
[phone]
[phone]
[phone]
81-7-2070-1174
81-3-3607-5144
[phone]
[phone]
44-61-627-5467
Q
, Step-Up DC-DC Controllers
FAX
lead, and the output filter capacitor ground lead to a
single point (star ground configuration). Also, minimize
lead lengths to reduce stray capacitance, trace resis-
tance, and radiated noise. Place input bypass capaci-
tor C2 as close as possible to V+ and GND.
Excessive noise at the V+ input may falsely trigger the
timing circuitry, resulting in short pulses at EXT. If this
occurs it will have a negligible effect on circuit efficien-
cy. If desired, place a 4.7µF directly across the V+ and
GND pins (in parallel with the 0.1µF C2 bypass capaci-
tor) to reduce the noise at V+.
N-FET
NPN
Siliconix
Motorola
Zetex
Si9410DY
Si9420DY (high voltage)
MTP3055EL
MTD20N03HDL
ZTX694B
TRANSISTORS
Nihon
Motorola
1N5817–1N5822
MUR115 (high voltage)
EC10 series
DIODES
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