LT1614CS8 Linear Technology, LT1614CS8 Datasheet - Page 10

• Manufacturer Part Number: LT1614CS8
• Description: IC SW REG INVERTING 600KHZ 8SOIC
• Manufacturer: Linear Technology
• Type: Invertingr

Specifications of LT1614CS8

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: Adj to -24V
• Current - Output: 500mA
• Frequency - Switching: 600kHz
• Voltage - Input: 0.92 ~ 5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

OPERATIO
LT1614
Capacitors
As described previously, ceramic capacitors can be used
with the LT1614. For lower cost applications, small tanta-
lum units can be used. A value of 22 F is acceptable,
although larger capacitance values can be used. ESR is the
most important parameter in selecting an output capaci-
tor. The “flying” capacitor (C2 in the schematic figures)
should be a 1 F ceramic type. An X5R or X7R dielectric
should be used to avoid capacitance decreasing severely
with applied voltage. The input bypass capacitor is less
10
Table 1. Inductor Vendors
VENDOR
Sumida
Murata
Coiltronics
Table 2. Capacitor Vendors
VENDOR
Taiyo Yuden
AVX
Murata
U
PHONE
[phone]
[phone]
[phone]
PHONE
[phone]
[phone]
[phone]
URL
www.sumida.com
www.murata.com
www.coiltronics.com
URL
www.t-yuden.com
www.avxcorp.com
www.murata.com
critical, and either tantalum or ceramic can be used with
little trade-off in circuit performance. Some capacitor
types appropriate for use with the LT1614 are listed in
Table 2.
Diodes
A Schottky diode is recommended for use with the LT1614.
The Motorola MBR0520 is a very good choice. Where the
input to output voltage differential exceeds 20V, use the
MBR0530 ( a 30V diode).
PART
CLS62-22022
CD43-470
LQH3C-220
CTX20-1
PART
Ceramic Caps
Ceramic Caps
Tantalum Caps
Ceramic Caps
COMMENT
22 H Coupled
47 H
22 H, 2mm Height
20 H Coupled, Low DCR
COMMENT
X5R Dielectric