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PTV12020W Datasheet, PDF (9/22 Pages) Texas Instruments – 16-A, 12-V INPUT NONISOLATED WIDE-OUTPUT ADJUST SIP MODULE
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PTV12020W/L
SLTS231A – NOVEMBER 2004 – REVISED FEBRUARY 2005
APPLICATION INFORMATION (continued)
Note: This is not an extensive capacitor list. Capacitors from other vendors are available with comparable
specifications. Those listed are for guidance. The RMS ripple current rating and ESR (at 100 kHz) are critical
parameters necessary to ensure both optimum regulator performance and long capacitor life.
Designing for Fast Load Transients
The transient response of the dc/dc converter has been characterized using a load transient with a di/dt of 1
A/µs. The typical voltage deviation for this load transient is given in the data sheet specification table using the
optional value of output capacitance. As the di/dt of a transient is increased, the response of a converter
regulation circuit ultimately depends on its output capacitor decoupling network. This is an inherent limitation with
any dc/dc converter once the speed of the transient exceeds its bandwidth capability. If the target application
specifies a higher di/dt or lower voltage deviation, the requirement can only be met with additional output
capacitor decoupling. In these cases special attention must be paid to the type, value and ESR of the capacitors
selected.
If the transient performance requirements exceed that specified in the data sheet, or the total amount of load
capacitance is above 3,000 µF, the selection of output capacitors becomes more important.
Capacitor Vendor,
Type/Series (Style)
Panasonic, Aluminum
FC (Radial)
FK (SMD)
United Chemi-Con
FX, OS-Con (SMD)
LXZ, Aluminum (Radial)
PS, Poly-Aluminum (Radial)
PXA, Poly-Aluminum (SMD)
Nichicon, Aluminum
HD (Radial)
PM (Radial)
Panasonic, Poly-Aluminum
A (SMD)
S/SE (SMD)
Sanyo
TP, Psocap
SP, Os-Con
SVP, Os-Con (SMD)
AVX, Tantalum, Series III
TPS (SMD)
Kemet (SMD)
Working
Voltage
(V)
Value
(µF)
25
330
Table 1. Input/Output Capacitors
Capacitor Characteristics
Max ESR
at 100 kHz
(Ω)
Max Ripple
Current at
85°C (Irms)
(mA)
0.090
775
Physical Size
(mm)
10 × 12.5
25
560
0.065
25
1,000
0.060
35
680
0.060
16
330
0.018
16
330
0.090
1205
1100
1100
4500
760
12.5 × 15
12.5 × 13.5
12.5 × 13.5
10 × 10.5
10 × 12.5
25
680
0.068
16
330
0.014
16
330
0.014
25
560
0.060
25
680
0.038
35
560
0.048
1050
5060
5050
1060
1430
1360
10 × 16
10 × 12.5
10 × 12.2
12.5 × 15
10 × 16
16 × 15
Quantity
Input
Bus
Optional
Output
Bus
Vendor
Part Number
2
1
EEUFC1E331 (VO ≤ 2.1 V,
or VO > 2.1 V and
IO ≤ 10 A)
1
1
EEUFC1E561S
1
1
EEVFK1E102Q
(VO≤ 3.4 V and IO ≤ 16 A)
1
1
EEVFK1V681Q
(VO ≤ 3.4 V and IO ≤ 16 A)
2
≤3
16FX330M
2
1
LXZ25VB331M10X12LL
(VO ≤ 2.1V, or VO > 2.1V
and IO ≤ 10 A
1
1
LXZ16VB681M10X16LL
(VO ≤ 3.4 V and IO ≤ 16 A)
2
≤2
16PS330MJ12
2
≤3
PXA16VCMJ12
1
1
UPM1E561MHH6
(VO ≤ 3.4 V and IO ≤ 16 A)
1
1
UHD1C681MHR
1
1
UPM1V561MHH6
16
330
6.3
180
0.022
0.005
10
330
0.025
16
270
0.018
16
330
0.016
10
470
0.045
10
330
0.045
4100
4000
3000
>3500
4700
>1723
>1723
10 × 10.2
7.3 × 154.3 × 4.2
2
N/R (1)
7.3 L × 5.7 W
10 × 10.5
11 × 12
7.3L × 5.7 W × 4.1 H
N/R (1)
2 (2)
2
N/R (1)
N/R (1)
≤3
EEFWA1C331P
≤1
EEFSE0J181R
(VO≤ 5.1 V)
≤4
10TPE330M
≤3
16SP270M
≤3
16SVP330M
≤5
TPSE477M010R0045
(VO≤ 5.1 V)
≤5
TPSE337M010R0045
(VO ≤ 5.1 V)
(1) N/R – Not recommended. The voltage rating does not meet the minimum operating limits.
(2) Total capacitance of 540 µF is acceptable based on the combined ripple current rating.
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