ST755CD STMicroelectronics, ST755CD Datasheet - Page 8

• Manufacturer Part Number: ST755CD
• Description: IC REG ADJ INVERT NEG OP 8 SOIC
• Manufacturer: STMicroelectronics
• Type: Invertingr

Specifications of ST755CD

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: Adjustable
• Current - Output: 200mA
• Frequency - Switching: 160kHz
• Voltage - Input: 2.4 ~ 11 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Power - Output: 470mW
• Output Voltage: 11 V
• Operating Temperature Range: - 40 C to + 185 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2124-5

6
Figure 3.
8/16
Application circuit
To achieve the best performances from switching power supply topology, particular care to
layout drawing is needed, in order to minimize EMI and obtain low noise, jitter free operation
moreover, it ensures the full device functionality. Layout design proposed on demoboard
(see
and by-pass capacitors C
the integrated circuit. The 10µH inductor must be chosen built on a core, taking care that
saturation current should be higher than the peak LX switch current. See the Peak inductor
current vs. load current graph
Typical application circuit
(*) R1 and R2 can be omitted for I
(**) C6: Very low noise but poor transient and load response speed.
(***) C3 (alternative to C6): faster transient and load response.
Figure
4.) helps to lower the developing time. Wire lengths must be minimized, filter
1
, C
O
<200mA.
2
(Figure
and C
3
6.).
must be low ESR type, placed as close possible to