ER3125QI Datasheet, PDF (7/30 Pages) Altera Corporation – MOSFET for Synchronous Buck or Boost Buck Converter

Page 7
Electrical Specifications Refer to “Block Diagram” on page 14 and “Typical Application Schematics” on page 4. Operating Conditions
Unless Otherwise Noted: V_PVIN = 12V, or V_AVINO = 4.5V ±10%, T_A = -40°C to +105°C. Typicals are at T_A = +25°C. Boldface limits apply across the
operating temperature range, -40°C to +105°C. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
(Note 5) TYP (Note 5) UNITS
Maximum Output Voltage
3.6
V
Minimum Output Voltage
0.5
V
Slew Rate
LLM CONTROL
SR
C_LOAD = 50pF
5
V/µs
Default LLM Current Threshold
LLM = AVINO or floating
700
mA
INTERNAL HIGH-SIDE MOSFET
Upper MOSFET R_DS(ON)
LOW-SIDE MOSFET GATE DRIVER
R_{DS(ON)_UP} Limits apply for +25°C only
127
140 mΩ
LGate Source Resistance
100mA source current
3.5
Ω
LGATE Sink Resistance
100mA sink current
2.8
Ω
BOOST CONVERTER CONTROL
BOOST Boost_Off Threshold Voltage
0.74
0.8
0.86 V
BOOST Hysteresis Sink Current
AVIN Boost Turn-Off Threshold Voltage
I_{BOOST_HYS}
2.1
3.2
4.2 µA
0.74
0.8
0.86 V
AVIN Hysteresis Sink Current
POWER-GOOD MONITOR
I_{AVIN_HYS}
2.1
3.2
4.2 µA
Overvoltage Rising Trip Point
Overvoltage Rising Hysteresis
Undervoltage Falling Trip Point
Undervoltage Falling Hysteresis
POK Rising Delay
POK Leakage Current
POK Low Voltage
OVERCURRENT PROTECTION
V_FB/V_REF
V_FB/V_OVTRIP
V_FB/V_REF
V_FB/V_UVTRIP
t_{POK_R_DELAY}
V_POK
Percentage of reference point
Percentage below OV trip point
Percentage of reference point
Percentage above UV trip point
POK HIGH, V_POK = 4.5V
POK LOW, IPOK = 0.2mA
104
110
116 %
3
%
84
90
96
%
3
%
128
cycle
10
nA
0.10
V
Default Cycle-by-Cycle Current Limit Threshold
Hiccup Current Limit Threshold
OVERVOLTAGE PROTECTION
I_{OC_1}
I_{OC_2}
I_RCLX = GND or AVINO or floating
Hiccup, I_{OC_2}/I_{OC_1}
3
3.6
4.2
A
115
%
OV 120% Trip Point
Active in and after soft-start.
Percentage of reference point
LG = UG = LOW
120
%
OV 120% Release Point
Active in and after soft-start.
Percentage of reference point
102.5
%
OV 110% Trip Point
Active after soft-start done.
Percentage of reference point
LG = UG = LOW
110
%
OV 110% Release Point
Active after soft-start done.
Percentage of reference point
102.5
%
OVER-TEMPERATURE PROTECTION
Over-Temperature Trip Point
160
°C
May 2014 Altera Corporation
10040
Enpirion Power Datasheet ER3125QI 2.5A Regulator with Integrated High-Side MOSFET for
Synchronous Buck or Boost Buck Converter
May 28, 2014
Rev A