ER2120QI Datasheet, PDF (6/24 Pages) Altera Corporation – 2A Synchronous Buck Regulator with Integrated MOSFETs

Page 6
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
REFERENCE VOLTAGE
Reference Voltage
System Accuracy
V_REF
0.600
V
-1.0
+1.0
%
FB Pin Bias Current
±80 ±200
nA
SOFT-START
Soft-Start Current
I_SS
Enable Soft-Start Threshold
20
30
40
µA
0.8
1.0
1.2
V
Enable Soft-Start Threshold
Hysteresis
12
mV
Enable Soft-Start Voltage High
2.8
3.2
3.8
V
ERROR AMPLIFIER
DC Gain
88
dB
Gain-Bandwidth Product
GBWP
15
MHz
Maximum Output Voltage
3.9
4.4
V
Slew Rate
SR
5
V/µs
INTERNAL MOSFETS
Upper MOSFET R_DS(ON)
Lower MOSFET R_DS(ON)
POK
r_{DS_UPPER}
r_{DS_LOWER}
V_AVIN = 5V
V_AVIN = 5V
180
m
90
m
POK Threshold
V_FB/V_REF
Rising Edge Hysteresis 1%
Falling Edge Hysteresis 1%
107
111
115
%
86
90
93
%
POK Rising Delay (Note 8)
POK Leakage Current
POK Low Voltage
POK Sinking Current
PROTECTION
t_{POK_DELAY}
V_POK
I_POK
f_OSC = 500kHz
V_POK = 5.5V
1
ms
5
µA
0.10
V
0.5
mA
Positive Current Limit
Negative Current Limit
Undervoltage Level
Thermal Shutdown Setpoint
Thermal Recovery Setpoint
I_{POC_peak}
I_{NOC_peak}
V_FB/V_REF
T_SD
T_SR
IOC from PVIN to SW (Notes 6, 7)
(T_A = 0°C to +85°C)
IOC from PVIN to SW (Notes 6, 7)
(T_A = -40°C to +0°C)
IOC from SW to PGND (Notes 6, 7)
(T_A = 0°C to +85°C)
IOC from SW to PGND (Notes 6, 7)
(T_A = -40°C to +85°C)
2.1
3.5
4.5
A
2.0
3.4
4.0
A
2.2
3.0
3.5
A
1.9
2.8
3.7
A
76
80
84
%
150
°C
130
°C
ER2120QI 2A Synchronous Buck Regulator with Integrated MOSFETs
09615
March 14, 2014
March 2014 Altera Corporation
Rev A