Allegro MicroSystems A8600 Manual page 12

A8600
ELECTRICAL CHARACTERISTICS (continued)
unless otherwise specified
Characteristic
SW2 (ASYNCHRONOUS BUCK REGULATOR)
Input Voltage
Input Voltage Range 2
UVLO Start
UVLO Stop
UVLO Hysteresis
Voltage Regulation
Feedback Voltage Accuracy
Output Voltage Setting Range
Output Dropout Voltage 3
Internal MOSFET 2
High-Side MOSFET On-Resistance
High-Side MOSFET Leakage 1
Low-Side MOSFET On-Resistance
BOOT Regulator
BOOT Voltage Enable Threshold
BOOT Voltage Enable Hysteresis
Error Amplifier
Feedback Input Bias Current 1
Open Loop Voltage Gain
Transconductance
Output Current
Maximum Output Voltage
Minimum Output Voltage
COMP2 Pull Down Resistance
Pulse Width Modulation (PWM)
PWM Ramp Offset
Minimum Controllable On-Time
Minimum Switch Off-Time
COMP2 to SW2 Current Gain
Slope Compensation
Continued on the next page...
Quadruple Output Regulator with Two High-Side Switches,
BU/ACC Voltage Detectors, and Mute Delay
Valid at 5.5 V ≤ V
Symbol Test Conditions
V
IN2
V V rising
UVLOON2 IN2
V V falling
UVLOOFF2 IN2
V
UVLOHYS2
V V ≥ 4.4 V, V
FB2 IN2 FB2
V (typ) value is design target, see footnote 2
SW2
V
SW2
for min and max voltages
V V = 6.0 V, I
SW(PWM)2 IN2 SW2
R T = 25ºC, I = 1.5 A
DS(on)HS2 J DS2
T < 65°C,V
J EN/SYNC
I
HS(LKG)2
V = 12 V
IN2
R T = 25ºC
DS(on)LS2 J
V V rising
BOOT(TH)2 BOOT2
V
BOOT(HYS)2
I
FB2
A V = 1.2 V
VOL2 COMP2
400 mV < V
FB2
g
m2
0 V < V < 400 mV
FB2
I V = 1.2 V
EA2 COMP2
V
EAO(max)2
V
EAO(min)2
R Fault condition
COMP2
V V set for 0% duty cycle
PWMOFFSET2 COMP2
t
ON(MIN)2
t
OFF(MIN)2
g
mPOWER2
S
E2
≤ 26 V, –40°C ≤ T
INx
= V
COMP2
= 1 A
≤ 0.8 V, V = 0 V,
LX2
≤ 125ºC, –40°C ≤ T ≤ 125ºC;
A J
Min. Typ. Max.
4.4 − 35
4.1 4.25 4.4
3.6 3.75 3.9
− 500 −
788 800 812
1.2 8.0 9.2
5.0 − −
− 120 140
−5 − 5
− − 10
1.85 2.10 2.30
− 375 −
–100 – –8
52 60 65
550 750 950
275 375 475
− ±75 −
1.3 1.7 2.1
− − 200
− 1 −
− 400 −
80 140 180
40 95 135
− 3.6 −
300 450 600
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Unit
V
V
V
mV
mV
V
V
mΩ
μA
Ω
V
mV
nA
dB
μA/V
μA/V
μA
V
mV
kΩ
mV
ns
ns
A/V
mA/μs
12