Datasheet

Power-Up Characteristics
PTN78060W , PTN78060H
SLTS229B – NOVEMBER 2004 – REVISED JUNE 2009 ................................................................................................................................................... www.ti.com
Table 6. Recommended Input/Output Capacitors (PTN78060H)
CAPACITOR CHARACTERISTICS QUANTITY
85 ° C
CAPACITOR VENDOR/
EQUIVALENT
VENDOR
WORKING MAXIMUM PHYSICAL
COMPONENT
VALUE SERIES INPUT OUTPUT
NUMBER
VOLTAGE RIPPLE SIZE
SERIES
( µ F) RESISTANCE BUS BUS
(V) CURRENT (mm)
(ESR) ( Ω )
(I
RMS
) (mA)
Panasonic FC( Radial) 50 100 0.162 615 10 × 12.5 1 ≥ 1 EEUFC1H101
FK (SMD) 50 150 0.18 670 10 × 10,2 1
(1)
≥ 1 EEVFK1H151P
United Chemi-Con PXA (SMD) 16 180 0.016 4360 8 × 12 ≤ 1 PXA16VC180MF60
N/R
(2)
(V
O
< 14 V)
LXZ 50 120 0.160 620 10 × 12,5 1
(1)
≥ 1 LXZ50VB121M10X12LL
MVY(SMD) 50 100 0.300 500 10 × 10 1 ≥ 1 MVY50VC101M10X10TP
Nichicon UWG (SMD) 50 100 0.300 500 10 × 10 1 ≥ 1 UWG1H101MNR1GS
HD 50 120 0.072 979 10 × 12,5 1 ≥ 1 UHD1H151MHR
Sanyo Os-Con SVP (SMD) 20 100 0.024 2500 8 × 12 1
(1)
≤ 2 20SVP100M (V
I
~V
O
≤ 16 V)
SP 20 120 0.024 3110 8 × 10,5 1
(1)
≤ 2 20SP120M (V
I
~V
O
≤ 16 V)
TDK X7R Ceramic 25 2.2 0.002 > 1000 3225 ≥ 6
(3)
1 C3225X7R1E225KT/MT
(V
I
~V
O
≤ 20 V)
Murata X7R Ceramic 25 2.2 0.002 > 1000 3225 ≥ 6
(3)
1 GRM32RR71E225K
(V
I
~V
O
≤ 20 V)
Kemet X7R Ceramic 25 2.2 0.002 > 1000 3225 ≥ 6
(3)
1 C1210C225K3RAC
(V
I
~V
O
≤ 20 V)
AVX X7R Ceramic 25 2.2 0.002 > 1000 3225 ≥ 6
(3)
1 C12103C225KAT2A
(V
I
~V
O
≤ 20 V)
Murata X7R Ceramic 50 4.7 0.002 > 1000 3225 ≥ 3 1 GRM32ER71H475KA88L
TDK X7R Ceramic 50 3.3 0.002 > 1000 3225 ≥ 4
(4)
1 CKG45NX7R1H335M
Murata Radial Through-hole 50 3.3 0.003 > 1000 12,5 H × ≥ 4
(5)
1 RPER71H3R3KK6F03
12,5 W × 4
Kemet Radial Through-hole 50 4.7 0.003 > 1000 5,08 × 7,62 ≥ 3 1 C350C475K5R5CA
× 9,14
(1) The voltage rating of the input capacitor must be selected for the desired operating input voltage range of the regulator. To operate the
regulator at a higher input voltage, select a capacitor with the next higher voltage rating.
(2) Not recommended (N/R). The voltage rating does not meet the minimum operating limits in most applications.
(3) The maximum rating of the ceramic capacitor limits the regulator ' s operating input voltage to 20 V. Select an alternative ceramic
component to operate at a higher input voltage.
(4) A total capacitance of 13.2 F is an acceptable replacement value for 3 × 4.7 F ceramic capacitors
(5) A total capacitance of 2 µ F is an acceptable replacement value for a single 2.2- µ F ceramic capacitor
When configured per the standard application, the PTN78060 power module produces a regulated output voltage
following the application of a valid input source voltage. During power up, internal soft-start circuitry slows the
rate that the output voltage rises, thereby limiting the amount of in-rush current that can be drawn from the input
source. The soft-start circuitry introduces a short time delay (typically 5 ms – 10 ms) into the power-up
characteristic. This is from the point that a valid input source is recognized. Figure 29 shows the power-up
waveforms when operating from a 12-V input and with the output voltage adjusted to 5 V. The waveforms were
measured with a 2.8-A resistive load.
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