PI352X-00 Datasheet, PDF (16/34 Pages) Vicor Corporation – 30VIN to 60VIN Cool-Power ZVS Buck Regulator

PI3526-00 (12V_OUT) Electrical Characteristics (Cont.)
Specifications apply for -40°C < T_INT < 120°C, V_IN = 48V, EN = High, unless otherwise noted.
Parameter
Symbol
Conditions
PI352x-00
Min
Typ
Max
Unit
Switching Frequency
Fault Restart Delay
f_s
t_{FR_DLY}
Timing
[6] _{While in DCM operating mode only, SYNCI grounded}
658
700
742
kHz
30
ms
Synchronization Input (SYNCI)
Synchronization Frequency Range
f_SYNCI
-50% and +10% relative to set switching frequency (f_S),
while in DCM operating mode only. ^[3] and ^[6]
350
770
kHz
SYNCI Threshold
V_SYNCI
2.5
V
SYNCO High
SYNCO Low
SYNCO Rise Time
SYNCO Fall Time
V_{SYNCO_HI}
V_{SYNCO_LO}
t_{SYNCO_RT}
t_{SYNCO_FT}
Synchronization Output (SYNCO)
Source 1mA
Sink 1mA
20pF load
20pF load
4.5
V
0.5
V
10
ns
10
ns
Soft Start, Tracking and Error Amplifier
TRK Active Range (Nominal)
V_TRK
0
1.4
V
TRK Enable Threshold
V_{TRK_OV}
20
40
60
mV
TRK to EAIN Offset
V_{EAIN_OV}
50
80
110
mV
Charge Current (Soft Start)
I_TRK
30
50
70
µA
Discharge Current (Fault)
I_{TRK_DIS}
V_TRK = 0.5V
8.7
mA
TRK Capacitance, Internal
C_{TRK_INT}
47
nF
Soft-Start Time
t_SS
C_{TRK_EXT} = 0µF
0.6
0.94
1.6
ms
Error Amplifier Trans-Conductance
GM_EAO
[2]
7.6
mS
PSM Skip Threshold
PSM_SKIP
[2]
0.8
V
EAIN Capacitance, Internal
C_EAIN-INT
56
pF
Error Amplifier Output Impedance
R_OUT
[2]
1
MΩ
Internal Compensation Capacitor
C_HF
[2]
56
pf
Internal Compensation Resistor
R_ZI
[2]
5
kΩ
[1] _{All parameters reflect regulator and inductor system performance. Measurements were made using a standard PI352x evaluation board with 2.5 x 4”}
dimensions and 4 layer, 2oz copper. Refer to inductor pairing table within Application Description section for specific inductor manufacturer and value.
[2] _{Regulator is assured to meet performance specifications by design, test correlation, characterization, and/or statistical process control.}
Output voltage is determined by an external feedback divider ratio.
[3] _{Output current capability may be limited and other performance may vary from noted electrical characteristics when VOUT is not set to nominal.}
[4] _{Refer to Output Ripple plots.}
[5] _{Refer to Load Current vs. Ambient Temperature curves.}
[6] _{Refer to Switching Frequency vs. Load current curves.}
Cool-Power^® ZVS Switching Regulators
Page 16 of 34
Rev 1.3
06/2017
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