LM3352-3.0EVAL National Semiconductor, LM3352-3.0EVAL Datasheet - Page 10

• Manufacturer Part Number: LM3352-3.0EVAL
• Description: EVALUATION BOARD FOR LM3352-3.0
• Manufacturer: National Semiconductor

Specifications of LM3352-3.0EVAL

• Main Purpose: DC/DC, Step Up or Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 3V
• Current - Output: 200mA
• Voltage - Input: 2.5 ~ 5.5V
• Regulator Topology: Buck-Boost
• Board Type: Fully Populated
• Utilized Ic / Part: LM3352
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Frequency - Switching: -
• Other names: *LM3352-3.0EVAL

www.national.com
Maximum Available Output Current
The LM3352 cannot provide 200 mA under all V
conditions. The V
mance Characteristics section show the minimum V
which the LM3352 is capable of providing different load
currents while maintaining V
Electrical Characteristics for guaranteed conditions.
Maximum Load Under Start-Up
Due to the LM3352’s unique start-up sequence, it is not able
to start up under all load conditions. Starting with 45 mA or
less will allow the part to start correctly under any tempera-
ture or input voltage conditions. After the output is in regu-
lation, any load up to the maximum as specified in the
Electrical Characteristics may be applied. Using a Power On
Typical Application Circuits
OUT
vs V
IN
FIGURE 3. Low Output Noise and Ripple Buck/Boost Regulator
OUT
graphs in the Typical Perfor-
regulation. Refer to the
FIGURE 2. Basic Buck/Boost Regulator
IN
and V
IN
OUT
at
10
Reset circuit, such as the LP3470, is recommended if
greater start up loads are expected. Under certain conditions
the LM3352 can start up with greater load currents without
the use of a Power On Reset Circuit (See application note
AN-1144: Maximizing Startup Loads with the LM3352 Regu-
lated Buck/Boost Switched Capacitor Converter).
Thermal Protection
During output short circuit conditions, the LM3352 will draw
high currents causing a rise in the junction temperature.
On-chip thermal protection circuitry disables the charge
pump action once the junction temperature exceeds the
thermal trip point, and re-enables the charge pump when the
junction temperature falls back to a safe operating point.
10103733
10103715