MIC7401 Datasheet, PDF (12/68 Pages) Micrel Semiconductor – Configurable PMIC, Five-Channel Buck Regulator plus One-Boost with HyperLight Load®, I2C Control, and Enable

Micrel, Inc.
MIC7401
Electrical Characteristics⁽⁷⁾ (Continued)
VIN = AVIN = PVIN(1-6) = 5.0V; VOUT1 = 1.8V; VOUT2 = 1.1V; VOUT3 = 1.8V; VOUT4 = 1.05V; VOUT5 = 1.25V; VOUT6 = 12V (refer to the
Evaluation Board Schematic for component values). TA = 25°C, unless otherwise noted. Bold values indicate −40°C ≤ TJ ≤ +125°C.
Parameter
Conditions
Min.
Typ.
Max.
Unit
Synchronous Buck (VOUT1 - VOUT5)
Buck Output Voltage Accuracy (OUT[1-5])
Typical Output Voltage 1 Accuracy ⁽¹¹⁾ Includes Load, Line and Reference
−1.5%
Typical Output Voltage 2 Accuracy ⁽¹¹⁾ Includes Load, Line and Reference
−1.5%
Typical Output Voltage 3 Accuracy ⁽¹¹⁾ Includes Load, Line and Reference
−1.5%
Typical Output Voltage 4 Accuracy ⁽¹¹⁾ Includes Load, Line and Reference
−1.5%
Typical Output Voltage 5 Accuracy ⁽¹¹⁾ Includes Load, Line and Reference
−1.5%
Output Voltage 1 Accuracy ⁽¹¹⁾
−1%
Output Voltage 2 Accuracy ⁽¹¹⁾
−1%
Output Voltage 3 Accuracy ⁽¹¹⁾
−1%
Output Voltage 4 Accuracy ⁽¹¹⁾
−1%
Output Voltage 5 Accuracy ⁽¹¹⁾
−1%
Load Regulation
Line Regulation
Buck Soft-Start
Soft-Start (1-5) LSB ^{(10, 12)}
IOUT = 10mA to IOUT(MAX)
VIN = 3.3V to 5.0V
3.84
Buck Internal MOSFETs
High-Side On-Resistance
High-Side On-Resistance
Low-Side On-Resistance
Low-Side On-Resistance
VIN = 3.3V; ISW[1-5] = 200mA
VIN = 5.0V; ISW[1-5] = 200mA
VIN = 3.3V; ISW[1-5] = -200mA
VIN = 5.0V; ISW[1-5] = -200mA
Output Pull-Down Resistance
VSW[1-5] = 0V
75
Buck Controller Timing
Fixed On-Time ⁽¹³⁾
Minimum OFF-Time
VIN = 3.3; VOUT = 1.0V; IOUT = 1.0A
Note:
11. Not tested in a closed loop configuration.
12. The soft-start time is calculated using the following equation: tsoftstart = [(VOUT_PROGRAM – 0.15)/0.05 +1) × tRAMP.
13. Buck frequency is calculated using the following equation fSW = (VOUT/VIN) × (1/tON).
0.1
0.05
4
54
40
37
30
90
220
80
1.5%
1.5%
1.5%
1.5%
1.5%
1%
1%
1%
1%
1%
4.16
200
%
%
%
%
%
%
%
%
%
%
%
%
µs/step
mΩ
mΩ
mΩ
mΩ
Ω
ns
ns
March 16, 2015
12
Revision 1.0