PTN78060A Datasheet, PDF (11/18 Pages) Texas Instruments – 15-W, WIDE-INPUT ADJUSTABLE POSITIVE-TO-NEGATIVE VOLTAGE REGULATOR MODULE

PTN78060A
www.ti.com
SLTS245A – APRIL 2005 – REVISED MAY 2005
Designing for 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
required value of output capacitance. As the di/dt of a transient is increased, the response of a converter's
regulation circuit ultimately depends on its output capacitor decoupling network. This is an inherent limitation of
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 those specified in the data sheet, the selection of output
capacitors becomes more important. Review the minimum ESR in the characteristic data sheet for details on the
capacitance maximum.
Table 3. Recommended Input/Output Capacitors
CAPACITOR VENDOR/
COMPONENT
SERIES
FC( Radial)
FC (SMD)
United Chemi-Con PXA (SMD)
PS
LXZ
MVY(SMD)
Nichicon UWG (SMD)
F550 (Tantalum)
HD
Sanyo Os-Con SVP (SMD)
SP
AVX Tantalum TPS (SMD)
Murata X5R Ceramic
Murata X5R Ceramic
TDK X7R Ceramic
Murata X7R Ceramic
Kemet X7R Ceramic
AVX X7R Ceramic
Murata X7R Ceramic
TDK X7R Ceramic
Murata Radial Through-hole
WORKING
VOLTAGE
(V)
35
35
16
25
50
50
50
10
50
20
16
20
20
16
6.3
25
25
25
25
50
50
50
CAPACITOR CHARACTERISTICS
VALUE
(µF)
EQUIVALENT
SERIES
RESISTANCE
(ESR) (Ω)
100
0.117
85°C
MAXIMUM
RIPPLE
CURRENT
(I_RMS) (mA)
555
100
0.015
670
180
0.016
4360
100
0.020
100
0.22
100
0.300
100
0.300
100
0.055
120
0.072
100
0.024
100
0.032
100
0.085
4300
485
500
500
2000
979
2500
2890
1543
100
0.200
> 817
47
0.002
>1000
47
0.002
>1000
2.2
0.002
>1000
2.2
0.002
>1000
2.2
0.002
>1000
2.2
0.002
>1000
4.7
0.002
2.2
0.002
2.2
0.004
>1000
>1000
>1000
QUANTITY
PHYSICAL
SIZE
(mm)
INPUT OUTPUT
BUS BUS
VENDOR
NUMBER
8 x 11,5
10 x10,2
8 x 12
≥1
≥1
≥1 ⁽¹⁾
10 x 12,5
8 x 12,5
10 x 10
10 x 10
7,7 x 4,3
10 x12,5
8 x 12
10 x 5
7,3 L x 4,3
W x 4,1 H
≥1 ⁽¹⁾
≥1 ⁽¹⁾
≥1
≥1
N/R ⁽¹⁾
≥1
≥1 ⁽¹⁾
≥ 1 ⁽¹⁾
N/R ⁽³⁾
N/R ⁽³⁾
3225
≥3 ⁽¹⁾
3225
N/R ⁽¹⁾
3225
≥ 6 ⁽⁴⁾
3225
≥ 6 ⁽⁴⁾
3225
≥ 6 ⁽⁴⁾
3225
≥ 6 ⁽⁴⁾
3225
≥3
3225
≥6
10 H x 10 W ≥ 6
x4D
1
1
≤1
≤1
1
1
1
≤ 3 ⁽²⁾
1
≤1
≤1
≤3
≤3
≤3
≤3
1
1
1
1
1
1
1
EEUFC1V01
EEVFC1V101P
PXA16VC180MF60 (V_I, |V_O| <
14 V)
10PS100MJ12 (V_I < 22V)
LXZ50VB101M8X12LL
MVY50VC101M10X10TP
UWG1H101MNR1GS
F551A107MN (|V_O| ≤ 5 V)
UHD1H151MHR
20SVP100M (V_I ≤ 16 V)
16SP100M (V_I, |V_O| ≤ 14 V)
TPSV107M020R0085
(|V_O| ≤ 10 V)
TPSE107M020R0200
(|V_O| ≤ 10 V)
GRM32ER61C476M
(V_I, |V_O| ≤ 13.5 V)
GRM42-2X5R476M6.3
(|V_O| ≤ 5.5 V)
C3225X7R1E225KT/MT
(V_I ≤ 20 V)
GRM32RR71E225K
(V_I ≤ 20 V)
C1210C225K3RAC
(V_I ≤ 20 V)
C12103C225KAT2A
(V_I ≤ 20 V)
GRM32ER71H475KA88L
C3225X7R1H225KT
RPER71H2R2KK6F03
(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) The maximum voltage rating of the capacitor must be selected for the desired set-point voltage (V_O ). To operate at a higher output
voltage, select a capacitor with a higher voltage rating.
(3) Not recommended (N/R). The voltage rating does not meet the minimum operating limits in most applications.
(4) 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.
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