LT1933ES6#PBF Linear Technology, LT1933ES6#PBF Datasheet - Page 10

• Manufacturer Part Number: LT1933ES6#PBF
• Description: IC, STEP-DOWN REGULATOR, 6-TSOT-23
• Manufacturer: Linear Technology

Specifications of LT1933ES6#PBF

• Primary Input Voltage: 36V
• No. Of Outputs: 1
• Output Current: 600mA
• No. Of Pins: 6
• Operating Temperature Range: -40°C To +85°C
• Supply Voltage Range: 3.6V To 36V
• Switching Frequency Max: 600kHz
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

APPLICATIONS INFORMATION
Figure 1 shows the transient response of the LT1933 with
several output capacitor choices. The output is 3.3V. The
load current is stepped from 100mA to 400mA and back to
100mA, and the oscilloscope traces show the output volt-
age. The upper photo shows the recommended value. The
second photo shows the improved response (less voltage
LT1933
10
16.5k
16.5k
FB
FB
10k
10k
16.5k
FB
10k
Figure 1. Transient Load Response of the LT1933 with Different
Output Capacitors as the Load Current is Stepped from 100mA
to 400mA. V
470pF
+
1933 F01c
100μF
SANYO
4TPB100M
V
OUT
1933 F01b
1933 F01a
22μF
2x
22μF
V
V
OUT
OUT
IN
= 12V, V
200mA/DIV
200mA/DIV
OUT
200mA/DIV
50mV/DIV
50mV/DIV
50mV/DIV
= 3.3V, L = 22μH.
V
V
V
I
I
I
OUT
OUT
OUT
OUT
OUT
OUT
drop) resulting from a larger output capacitor and a phase
lead capacitor. The last photo shows the response to a high
performance electrolytic capacitor. Transient performance
is improved due to the large output capacitance, but output
ripple (as shown by the broad trace) has increased because
of the higher ESR of this capacitor.
1933fe