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What is A8600EJPTR-T?

This electronic component, produced by the manufacturer "Allegro MicroSystems", performs the same function as "Quadruple Output Regulator".


A8600EJPTR-T Datasheet PDF - Allegro MicroSystems

Part Number A8600EJPTR-T
Description Quadruple Output Regulator
Manufacturers Allegro MicroSystems 
Logo Allegro MicroSystems Logo 


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A8600
Quadruple Output Regulator with Two High-Side Switches,
BU/ACC Voltage Detectors, and Mute Delay
Features and Benefits
• Four independent, high current switching regulators
• Adjustable 1.0 A/±1.5% always-on asynchronous buck
regulator with an integrated 150 mΩ MOSFET (SW1)
Employs PFM to deliver 3.3 V/40 μA while drawing less
than 50 μA from VIN of 12 V
Operates down to at least 3.6 VIN
• Adjustable 1.5 A/±1.5% asynchronous buck regulator with
an integrated 120 mΩ high-side MOSFET (SW2)
• Adjustable 2.0 A/±1.5% asynchronous buck regulator with
an integrated 110 mΩ MOSFET (SW3)
• Adjustable ±1.5% synchronous buck controller with
integrated gate drivers and current sensing (SW4)
• Fixed 425 kHz, interleaved PWM switching frequency
• EN/SYNC input for PWM frequency scaling
• Adjustable soft-start time for each switching regulator
• All switching regulators provide prebias startup with zero
reverse current
• All switching regulators have overvoltage protection
• External compensation for all switching regulators
Continued on the next page…
Package: 48-pin LQFP (suffix JP)
Description
Designed to provide the power supply requirements of next
generation car audio and infotainment systems, the A8600
provides all the control and protection circuitry to produce
four high current regulators, each with ±1.5% accuracy. The
A8600 includes control circuitry to implement three adjustable,
asynchronous buck regulators with integrated MOSFETs. Also,
the A8600 provides the control circuitry, gate drivers, and
current sensing to implement a synchronous buck controller
with external MOSFETs. In standby mode, the A8600 draws
less than 50 μA from VIN of 12 V while employing pulse
frequency modulation (PFM) to deliver 3.3 V/40 μA via the
always-on regulator, SW1. The always-on regulator operates
down to at least VIN of 3.6 V (VIN falling).
Features of the A8600 include: an EN/SYNC input to either
turn the A8600 on/off or increase/decrease the base pulse
width modulation (PWM) frequency, four adjustable soft-start
times, and four external compensation pins. Output voltage
monitoring of switchers SW2, SW3, and SW4 is provided
by a single, open-drain POK output. In addition, the A8600
provides two high voltage, high-side switches with foldback
overcurrent protection. These two high-side switches actively
block reverse current. The A8600 also provides direct battery
(BU) and switched (accessory) battery (ACC) detectors and
a mute pulse output with an adjustable delay.
Continued on the next page…
Not to scale
A8600-DS, Rev. 3
Switcher 1
(SW1)
Adjustable
Output Voltage
1.0 AAVG / 2.5 APEAK
Always-On
PWM / PFM
Asynchronous
Buck
Regulator
Switcher 2
(SW2)
Adjustable
Output Voltage
1.5 AAVG / 2.5 APEAK
PWM
Asynchronous
Buck
Regulator
Switcher 3
(SW3)
Adjustable
Output Voltage
2.0 AAVG / 2.5 APEAK
PWM
Asynchronous
Buck
Regulator
Switcher 4
(SW4)
Adjustable
Output Voltage
Adjustable ILIM
PWM
Synchronous
Buck
Controller
Charge
Pump
Enable and
Synchronization
(EN/SYNC)
425 kHz
180° Shift
High-Side Switch 1
(S1)
1.0 Ω Total
with
Foldback Limiting
High-Side Switch 2
(S2)
1.0 Ω Total
with
Foldback Limiting
BU and ACC
Detectors
Mute Pulse
with Delay
Figure 1. A8600 major features

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A8600EJPTR-T equivalent
A8600
Pin-Out Diagram
Quadruple Output Regulator with Two High-Side Switches,
BU/ACC Voltage Detectors, and Mute Delay
LX2 37
LX2 38
BOOT2 39
SS2 40
FB2 41
COMP2 42
COMP1 43
FB1 44
BIAS 45
SS1 46
BOOT1 47
LX1 48
PAD
24 COMP4
23 POK
22 OUT2
21 VINS
20 OUT1
19 ENS
18 COMP3
17 FB3
16 SS3
15 BOOT3
14 LX3
13 LX3
Name Number
Function
ACCI
8 Input to the ACC comparator
ACCO
7 Output of the ACC comparator
BIAS
45
Bias input, supplies internal circuitry when VSW1
is high enough
BOOT1
47 Floating gate drive for buck regulator SW1
BOOT2
39 Floating gate drive for buck regulator SW2
BOOT3
15 Floating gate drive for buck regulator SW3
BOOT4
31 Floating gate drive for buck regulator SW4
BUI 10 Input to the BU comparator
BUO
COMP1
COMP2
COMP3
9 Output of the BU comparator
43
Error amplifier compensation network for
regulator SW1
42
Error amplifier compensation network for
regulator SW2
18
Error amplifier compensation network for
regulator SW3
COMP4
24
Error amplifier compensation network for
regulator SW4
CSN
26 Current sense pin for buck regulator SW4
CSP
27 Current sense pin for buck regulator SW4
CTMR
5 Delay programming for the Mute pulse circuit
EN/SYNC
6
SWx enable and PFM control, and PWM
synchronization
ENS
19 S1/S2 enable input
FB1 44 Feedback pin for buck regulator SW1
FB2 41 Feedback pin for buck regulator SW2
FB3 17 Feedback pin for buck regulator SW3
Name
FB4
GND
HG4
LG4
LX1
LX2
LX3
LX4
MUTE
NC
OUT1
OUT2
PAD
PGND
POK
SS1
SS2
SS3
SS4
VIN1
VIN2
VIN3
VINS
VREG
Number
Function
25 Feedback pin for buck regulator SW4
3 Ground
29 High side gate drive for buck regulator SW4
32 Low side gate drive for buck regulator SW4
48 Switching node for buck regulator SW1
37, 38 Switching node for buck regulator SW2
13, 14 Switching node for buck regulator SW3
30 Switching node for buck regulator SW4
2
Open-drain, active low output of the Mute pulse
circuit
34 Unused
20 High-side switch S1 output
22 High-side switch S2 output
– Exposed pad for enhanced thermal dissipation
33 Power ground
23 Power OK open drain output
46 Soft start programming for regulator SW1
40 Soft start programming for regulator SW2
16 Soft start programming for regulator SW3
28 Soft start programming for regulator SW4
1 Input supply for buck regulator SW1
35, 36 Input supply for buck regulator SW2
11, 12 Input supply for buck regulator SW3 (and SW4)
21 S1/S2 high-side switch input
4 Internal voltage regulator bypass capacitor pin
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5


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Part NumberDescriptionMFRS
A8600EJPTR-TThe function is Quadruple Output Regulator. Allegro MicroSystemsAllegro MicroSystems

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