LT1616ES6#TRM Linear Technology, LT1616ES6#TRM Datasheet - Page 9

• Manufacturer Part Number: LT1616ES6#TRM
• Description: IC SW REG STEP-DN 1.4MHZ SOT23-6
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LT1616ES6#TRM

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 3.3V, 5V
• Current - Output: 600mA
• Frequency - Switching: 1.4MHz
• Voltage - Input: 3.6 ~ 25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-6
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Other names: LT1616ES6#TRMTR

APPLICATIO S I FOR ATIO
100mA/DIV
20mV/DIV
I
V
LOAD
Figure 3. Transient Load Response of the LT1616
OUT
0
C
C
C
C CASE
C
TPSC107M006R0150) C CASE
C
OUT
OUT
OUT
OUT
OUT
= 4.7 F CERAMIC, CASE SIZE 0805
= 10 F CERAMIC, CASE SIZE 1206
= 47 F, ESR 0.080 (SANYO POSCAP 6TPA47M)
= 100 F, ESR 0.150 (TANTALUM AVX
= 100 F TANTALUM AND 2.2 F CERAMIC
U
U
W
U
Regardless of which capacitor or combination of capaci-
tors you choose, you should do transient load tests to
evaluate the circuit’s stability. Avoid capacitors or combi-
nations that result in a ringing response. Problems may
occur if the output capacitance is very low or if a high value
inductor is used in combination with a large value, low
ESR capacitor.
The high performance (low ESR), small size and robust-
ness of ceramic capacitors make them the preferred type
for LT1616 applications. However, all ceramic capacitors
are not the same. Many of the higher value capacitors use
poor dielectrics with high temperature and voltage
coefficients. In particular, Y5V types should be regarded
with suspicion. Stick with X7R and X5R types. Don’t be
afraid to run them at their rated voltage. Table 2 lists
several capacitor manufacturers.
Catch Diode
A 0.5A Schottky diode is recommended for the catch diode
D1. The ON Semiconductor MBR0530 is a good choice; it
is rated for 0.5A forward current and a maximum reverse
voltage of 30V. For circuits with V
MBR0520L can be used. Other suitable diodes are the
Zetex ZHCS500TR and ZHCS750TR, and various versions
of the 1N5818.
10V
Figure 4. Circuit Used for Transient Load Test Shown in Figure 3
V
IN
5
4
V
SHDN
IN
GND
2
LT1616
BOOST
FB
SW
3
1
6
10 H
C
OUT
IN
less than 20V, the
33
1616 F04
LT1616
22
V
3.3V
OUT
9