MAX8614BETD+T Maxim Integrated Products, MAX8614BETD+T Datasheet - Page 12

• Manufacturer Part Number: MAX8614BETD+T
• Description: IC DC-DC CONV DL CCD 14TDFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX8614BETD+T

• Applications: Converter, CCD
• Voltage - Input: 2.7 ~ 5.5 V
• Number Of Outputs: 2
• Voltage - Output: Adjustable up to 24V, Adjustable down to -10V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 14-TDFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

For stability, the inverter output filter capacitor, C2,
should satisfy the following:
where R
(MAX8614A). D- is 1 minus the inverter switch duty cycle
and is:
Dual-Output (+ and -) DC-DC
Converters for CCD
Table 1. Inductor Selection Guide
Table 2. Component Suppliers
12
INDUCTORS
Murata
Sumida
TOKO
DIODES
Central
Semiconductor
(CMHSH5-2L)
Motorola
(MBR0540L)
CAPACITORS
Taiyo Yuden
TDK
15V, 50mA
-7.5V, 100mA
15V, 20mA
-7.5V, 40mA
AND LOAD CURRENT
OUTPUT VOLTAGES
______________________________________________________________________________________
SUPPLIER
CS
(R
= 0.0175 (MAX8614B), and 0.040
C2 > (6L V
CS
D- (V
770-436-1300 www.murata.com
847-297-0070 www.tokoam.com
631-435-1110 www.centralsemi.com
602-303-5454 www.motorola.com
408-573-4150 www.t-yuden.com
888-835-6646 www.TDK.com
847-545-600
PHONE
REF
REF
TOKO
DB3018C, 1069AS-2R0
TOKO
DB3018C, 1069AS-4R3
TOKO
S1024AS-4R3M
Sumida
CDRH2D14-4R7
TOKO
S1024AS-100M
Sumida
CDRH2D11-100
Sumida
CDRH2D14-100
Murata
LQH32CN100K33
- V
I
INVMAX
INV
) V
www.sumida.com
INDUCTOR
INV
) /
)
WEBSITE
L (µH)
2.0
4.3
4.3
4.7
10
10
10
10
Table 2 lists representative low-ESR capacitor suppliers.
Although the output current of many MAX8614A/
MAX8614B applications may be relatively small, the
input must be designed to withstand current transients
equal to the inductor current limit. The input bypass
capacitor reduces the peak currents drawn from the
voltage source, and reduces noise caused by the
MAX8614A/MAX8614B switching action. The input
source impedance determines the size of the capacitor
required at the input. As with the output filter capacitor,
a low-ESR capacitor is recommended. A 22µF, low-ESR
capacitor is adequate for most applications, although
smaller bypass capacitors may also be acceptable with
low-impedance sources or if the source supply is
already well filtered. Bypass AV
with a 1.0µF ceramic capacitor placed as close as pos-
sible to the AV
Proper PCB layout is essential due to high-current lev-
els and fast-switching waveforms that radiate noise.
Breadboards or protoboards should never be used
when prototyping switching regulators.
DCR (mΩ)
126
170
100
400
295
300
72
47
CC
and GND pins.
D- = V
PCB Layout and Routing
CC
I
SAT
0.97
0.35
0.46
0.45
1.4
1.2
0.8
/ V
1
Input Bypass Capacitor
(A)
CC
INV
separately from V
3.2 x 3.2 x 1.55
3.2 x 3.2 x 1.55
3.2 x 3.2 x 1.2
3.2 x 2.5 x 2
SIZE (mm)
3 x 3 x 1.8
3 x 3 x 1.8
4 x 4 x 1.7
4 x 4 x 1.7
CC