ER2120QI Datasheet, PDF (5/24 Pages) Altera Corporation – 2A Synchronous Buck Regulator with Integrated MOSFETs

Page 5
Absolute Maximum Ratings
PVIN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to +16.5V
AVIN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to +6.0V
Absolute Boot Voltage, V_BOOT . . . . . . . . . . . . . . . . . . . . . . . . +22.0V
Upper Driver Supply Voltage, V_BOOT - V_SW . . . . . . . . . . . . . . +6.0V
All other Pins . . . . . . . . . . . . . . . . . . . GND - 0.3V to AVIN + 0.3V
Thermal Information
Thermal Resistance
_JA (°C/W) _JC (°C/W)
QFN Package (Notes 2, 2) . . . . . .
38
2
Maximum Junction Temperature (Plastic Package) . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . -65°C to +150°C
Pb-free Reflow Profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . —
Recommended Operating Conditions
Supply Voltage on PVIN . . . . . . . . . . . . . . . . . . . . . . . . 5.5V to 14V
Ambient Temperature Range . . . . . . . . . . . . . . . . . . -40°C to +85°C
Junction Temperature Range . . . . . . . . . . . . . . . . . -40°C to +125°C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact
product reliability and result in failures not covered by warranty.
NOTES:
2. _JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features.
For _JC, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications Refer to “Block Diagram” and “Typical Application Schematics”. Operating conditions unless otherwise
noted: V_IN = 12V, or V_AVIN = 5V ±10%, T_A = -40°C to +85°C. Typical are at T_A = +25°C. Boldface limits apply over the operating temperature
range,
-40°C to +85°C
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX UNIT
(Note 3) TYP (Note 3) S
V_IN SUPPLY
PVIN Input Voltage Range
V_IN
5.5
(Note 4)
14
V
(Note 5)
Input Operating Supply Current
Input Standby Supply Current
SERIES REGULATOR
I_Q
IQ_SBY
V_IN tied to V_AVIN
V_FB = 1.0V
EN tied to GND, V_IN = 14V
4.5
5.5
V
7
mA
1.25
2
mA
AVIN Voltage
Maximum Output Current
AVIN Current Limit
POWER-ON RESET
V_AVINO
I_AVINO
V_IN > 5.6V
V_IN = 12V
V_IN = 12V, AVIN shorted to PGND
4.5
5.0
5.5
V
50
mA
300
mA
Rising AVIN POR Threshold
4.2
4.4
4.49
V
Falling AVIN POR Threshold
3.85
4.0
4.10
V
ENABLE
Rising Enable Threshold Voltage
Falling Enable Threshold Voltage
Enable Sinking Current
OSCILLATOR
V_{EN_Rising}
V_{EN_Fall}
I_EN
2.7
V
2.3
V
500
µA
PWM Frequency
f_OSC
R_T = 96k
R_T = 40k
FSW pin tied to AVIN
400
500
600
kHz
960 1200 1440 kHz
800
kHz
Ramp Amplitude
Ramp Amplitude
Modulator Gain
Maximum Duty Cycle
Maximum Duty Cycle
V_OSC
V_OSC
V_VIN/V_OSC
D_MAX
D_MAX
V_IN = 14V
V_IN = 5V
By Design
f_OSC = 500kHz
f_OSC = 1.2MHz
1.0
V
0.470
V
8
-
88
%
76
%
March 2014 Altera Corporation
09615
ER2120QI 2A Synchronous Buck Regulator with Integrated MOSFETs
March 14, 2014
Rev A