900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






Allegro

A8652 Datasheet Preview

A8652 Datasheet

Synchronous USB Buck Regulator

No Preview Available !

A8652, A8653
Wide Input Voltage, Synchronous USB Buck Regulator
with Remote Load Regulation
FEATURES AND BENEFITS
• Automotive AEC-Q100 qualified
• Cable and wiring drop compensation
• Dynamic voltage correction with controller
• Integrated high-side and low-side switching MOSFETs
• Programmable load-side current limit
• Maximized duty cycle for low dropout operation
• Operating input voltage range: 4 V to 36 V
• UVLO STOP threshold is at 2.6 VTYP
• Withstands surge voltages up to 40 V
• Continuous loading: 2.6 A for A8653; 1 A for A8652
• Adjustable switching frequency (fSW): 100 kHz to
2.2 MHz
• Synchronization to external clock: 100 kHz to 2.2 MHz
• Frequency dithering for lower EMI signature
• External adjustable compensation network
• Stable with ceramic output capacitors
Continued on next page...
PACKAGES:
16-Pin eTSSOP (suffix LP) with exposed thermal pad
Not to scale
DESCRIPTION
The A8652/53 is a high output current synchronous buck
regulator that provides tight load regulation over a wiring
harness without the need for remote sense lines.This remote load
regulation is achieved with an integrated open-loop correction
scheme that, given a known wiring harness resistance, adjusts
the output voltage based on the measured load current and a
user-programmable gain, achieving ±2% accuracy at 500 mV
of correction. The Remote Load Regulation control includes a
115% regulated voltage clamp in conjunction with a dynamic
overvoltage protection, with OVP threshold changing with the
correction voltage. TheA8652/53 includes a user-configurable
load-side current limit to fold back the output voltage during an
output overcurrent condition. TheA8652/53 regulates nominal
input voltages from 4 to 36 V and remains operational when
VIN drops as low as 2.6 V. When the input voltage approaches
the output voltage, the duty cycle is maximized to maintain
the output voltage.
The A8652/53 features include externally set soft-start time,
external compensation network, an EN input to enable VOUT,
a SYNC/FSET input to synchronize or set the PWM switching
APPLICATIONS
• Automotive USB Power Ports
• Rear Seat Entertainment
• Navigation Systems
• Motorcycle Clusters
Continued on next page...
VIN
CIN
VIN
2 × 4.7 µF
GND
EN
RFSET
SYNC/FSET
CSS
22 nF
SS
RZ
CP
CZ
COMP
FB
A8652/3
BOOT
SW
GADJ
CBOOT
100 nF
RGADJ
LO
CO
RSEN
VOUT
ISEN+
ISEN-
IADJ
CF
(optional)
RF
(optional)
RIADJ
POK
RPU
10 kΩ
RFB1
24.9 kΩ
RFB2
4.75 kΩ
RWIRE/2
RWIRE/2
VLOAD
CLOAD
A8652/53-DS, Rev.2
Typical Application Diagram 1




Allegro

A8652 Datasheet Preview

A8652 Datasheet

Synchronous USB Buck Regulator

No Preview Available !

A8652,
A8653
Wide Input Voltage, Synchronous USB Buck Regulator
with Remote Load Regulation
FEATURES AND BENEFITS (continued)
• Pre-bias startup compatible
• Power OK (POK) output
• Dynamic overvoltage protection, pulse-by-pulse current limit,
hiccup mode short-circuit, and thermal protections
• Open-circuit and adjacent pin short-circuit tolerant
• Short-to-ground tolerant at every pin
• USB3 charging capability: 2.6 A (A8653)
• USB2 capability: 1 A (A8652)
DESCRIPTION (continued)
frequency, and a Power OK output to indicate when VOUT is within
regulation and there is no load-side current limit condition. Protection
features include VIN undervoltage lockout, pulse-by-pulse current
limit, hiccup mode short-circuit protection, dynamic overvoltage
protection, and thermal shutdown. The A8652/53 provides open-
circuited, adjacent pin short-circuit, and short-to-ground protection
at every pin to satisfy the most demanding automotive and non-
automotive applications.
The A8652/53 device is available in a 16-pin eTSSOP package with
exposed pads for enhanced thermal dissipation. It is lead (Pb) free,
with 100% matte-tin lead frame plating. The maximum junction
temperature (TJ(max)) is 150ºC.
VIN VIN
CIN
2 × 4.7 µF
GND
EN
RFSET
52.3 kΩ
SYNC/FSET
CSS
22 nF
SS
RZ
CP
CZ
COMP
FB
A8653
BOOT
SW
IADJ
CBOOT
100 nF
LO 10 µH
RIADJ
20 kΩ
CO
2 × 22 µF
RSEN
20 mΩ
VOUT
RWIRE/2
62.5 mΩ
RWIRE/2
62.5 mΩ
VLOAD
CLOAD
100 µF
ISEN+
ISEN-
GADJ
RGADJ
20 kΩ
POK
CF
(optional)
RF
(optional)
RGE
VG
5V
RPU
10 kΩ
RFB1
24.9 kΩ
RFB2
4.75 kΩ
Typical Application Diagram 2 with Dynamic Voltage Correction Control at Pin GADJ
Selection Guide
Part Number
A8652KLPTR-T
A8653KLPTR-T
Packing
4000 pieces per 13-inch reel
Package
4.4 mm × 5 mm, 1.2 mm nominal height
16-pin eTSSOP with exposed thermal pad
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2


Part Number A8652
Description Synchronous USB Buck Regulator
Maker Allegro
Total Page 30 Pages
PDF Download

A8652 Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 A8651 Low Input Voltage Adjustable Frequency Dual Synchronous 2 A / 2 A Buck Regulator
Allegro
2 A8652 Synchronous USB Buck Regulator
Allegro
3 A8653 Synchronous USB Buck Regulator
Allegro





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy