ZY1120 Power-One, ZY1120 Datasheet - Page 3

• Manufacturer Part Number: ZY1120
• Description: Zy1120 20a No-bus Pol
• Manufacturer: Power-One

4.
Specifications apply at the input voltage from 3V to 14V, output load from 0 to 20A, ambient temperature from -
40°C to 85°C, output capacitance consisting of 110μF ceramic and 220μF tantalum, and default performance
parameters settings unless otherwise noted.
4.1
4.2
1
Therefore maximum allowable negative current under specific conditions is 20% lower than the current determined from the derating curves
shown in paragraph 5.5.
2
3
ZD-00790 REV. 1.5
ZY1120 is a step-down converter, thus the output voltage is always lower than the input voltage as show in Figure 1.
Digital PWM has an inherent quantization uncertainty of ±6.25mV that is not included in the specified static regulation parameters.
At the negative output current (bus terminator mode) efficiency of the ZY1120 degrades resulting in increased internal power dissipation.
Undervoltage Lockout (VLDO
Undervoltage Lockout (VLDO
Output Voltage Peak-to-Peak
Output Voltage Range (V
External Low Voltage Supply
Electrical Specifications
Input Current (at no load)
Output Voltage Setpoint
Temperature Coefficient
connected to V
Input Specifications
Output Specifications
Output Current (I
Switching Frequency
Dynamic Regulation
VLDO Input Current
Input voltage (V
connected to VIN)
Load Regulation
Ripple and Noise
Line Regulation
Peak Deviation
Peak Deviation
Settling Time
BW=20MHz
Parameter
Parameter
Accuracy
Full Load
AUX
3
OUT
=5V)
IN
3
3
)
)
OUT
)
connected to an external voltage source
Programmable
Slew rate 1A/μs, 50% to 75% load step,
V
Connect to VLDO pin when V
At V
IN
Current drawn from the external low
≥4.75V, VLDO pin connected to VIN
V
IN
IN
voltage supply at VLDO=5V
=12V, I
V
<4.75V, VLDO pin needs to be
Conditions/Description
Conditions/Description
to 10% of peak deviation
www.power-one.com
IN
V
V
V
V
=12V, I
Default (no resistor)
TRIM and REF pins
higher than 4.75V
IN
IN
IN
IN
V
V
Ramping Down
Ramping Down
=5.0V, V
=5.0V, V
=12V, V
=12V, V
IN MIN
IN MIN
Ramping Up
Ramping Up
OUT
temperature
0 to I
2
V
V
with a resistor between
IN
=0.5*I
OUT
IN
=3.3V
to V
to V
OUT MAX
≥5V
=0.5*I
OUT
OUT
OUT
OUT
IN MAX
IN MAX
OUT MAX
<2.5V
≥2.5V
<2.5V
≥2.5V
OUT MAX
3V to 14V Input
ZY1120 20A No-Bus POL Data Sheet
, room
IN
<4.75V
±1.5% or 20mV whichever is
4.75
-20
Min
Min
450
0.5
3
1
•
greater
0.5V to 5.5V Output
Nom
Nom
4.00
±0.2
±0.2
100
150
500
3.9
2.8
2.7
0.5
50
50
25
15
25
20
35
70
Page 3 of 17
Max
Max
550
5.5
20
14
14
ppm/°C
%V
%V
%V
mADC
mADC
Units
Units
ADC
VDC
VDC
VDC
VDC
VDC
VDC
VDC
VDC
kHz
mV
mV
mV
mV
mV
mV
μs
OUT
OUT
OUT