MAX17112 Maxim Integrated Products, MAX17112 Datasheet - Page 9

• Manufacturer Part Number: MAX17112
• Description: DC-DC Converter
• Manufacturer: Maxim Integrated Products

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Figure 3. Application Circuit Using Logic Input at SHDN
Step-up regulators using the MAX17112 can be
designed by performing simple calculations for a first
iteration. All designs should be prototyped and tested
prior to production. Table 1 provides a list of power
components for the typical applications circuit. Table 2
lists component suppliers.
Table 1. Component List
DESIGNATION
High-Performance, Step-Up, DC-DC Converter
C1, C2
C7, C8
L1
Applications Information
4.7μF
_______________________________________________________________________________________
10V
4.5V TO 5.5V
C1
4.7μF ±10%, 10V X5R ceramic
capacitors (0603)
TDK C1608X5R1A475K
10μF ±10%, 25V X5R ceramic
capacitors (1210)
Murata GRM32DR61E106K
2.7μH ±20% power inductor
TOKO FDV0630-2R7 (27m , 4.4A)
Sumida CDRH5D18BHPNP-2R7M
(65m , 3.9A)
V
IN
LOGIC
INPUT
4.7μF
10V
C2
SHDN PROTECTION
DESCRIPTION
RESISTOR
10kΩ
1μF
C9
3.3nF
1μF
C4
C3
10
8
9
3
IN
SHDN
V
SS
L
2.7μH
L1
560pF
47kΩ
MAX17112
C5
R2
COMP
1
U1
The choice of external components is primarily dictated
by output voltage, maximum load current, and maxi-
mum and minimum input voltages. Begin by selecting
an inductor value. Once the inductance is known,
choose the diode and capacitors.
The minimum inductance value, peak current rating,
and series resistance are factors to consider when
selecting the inductor. These factors influence the con-
verter’s efficiency, maximum output load capability,
transient response time, and output voltage ripple.
Physical size and cost are also important factors to be
considered.
Table 2. Component Suppliers
Murata
Sumida
TDK
SUPPLIER
C6
OPEN
GND
GND
GND
LX
LX
FB
6
7
5
4
2
EP
D1
770-436-1300
408-321-9660
516-535-2600
PHONE
R4
221kΩ
R3
20kΩ
C7
10μF
25V
+15V/600mA
Inductor Selection
C8
10μF
25V
www.murata.com
www.sumida.com
www.component.tdk.com
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OUT
WEBSITE
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