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AP3591 Datasheet

SINGLE PHASE SYNCHRONOUS BUCK CONTROLLER

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AP3591 pdf
Description
A Product Line of
Diodes Incorporated
AP3591
SINGLE PHASE SYNCHRONOUS BUCK CONTROLLER
Pin Assignments
The AP3591 is a synchronous adaptive on-time buck controller
providing high efficiency, excellent transient response and high DC
output accuracy for low voltage regulation in notebook application.
The constant-on-time PWM control scheme handles wide input/output
voltage ratios with ease and features small external component count
and fast transient response.
The operation mode is selectable by EN voltage. A Diode Emulation
Mode (DEM) is activated for increasing efficiency at light loads, while
PWM mode is activated only for low noise operation. The AP3591
also integrates internal Soft-start, UVLO, OVP, OTP, and
programmable OCP to protect the circuit. A Power Good signal is
employed to monitor the output voltage.
The AP3591 is available in U-QFN3535-14 package.
(Top View)
Pin 1 Mark
TON 2
VOUT 3
VDD 4
FB 5
PGOOD 6
1 14
13 UGATE
12 PHASE
EP 11 CS
10 VDDP
9 LGATE
78
U-QFN3535-14
Features
Applications
Fixed Frequency Constant On-time Control; Resistor
Programmable Frequency Adjustable from 100kHz to 700kHz
Good Stability Independent of the Output Capacitor ESR
Quick Load Step Response
Input Voltage Range: 4.5V to 26V
Output Voltage Range: 0.75V to 5.5V
CCM/DEM Mode Selection
Integrated Bootstrap Diode
Resistor Programmable Current Limit by Low-side RDS_ON
Sense
Integrated Negative Over Current Limit
Integrated OVP/UVP and Over Thermal Shutdown Function
Power Good Indicator
Internal Soft-start
Integrate Output Discharge (Soft-stop)
Safe Start-up into Pre-biased Loads
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notebook Computer, AIO PC
Low-voltage Distribute Power
I/O Supplies
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AP3591
Document number: DS36906 Rev. 1 - 2
1 of 18
www.diodes.com
March 2014
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AP3591 Datasheet

SINGLE PHASE SYNCHRONOUS BUCK CONTROLLER

No Preview Available !

AP3591 pdf
Typical Applications Circuit
VDDP
R2
100K
R1
10
C2
1 mF
CCM/ DEM
R6
30K C
Optional
R3 250K
2
TON
10
VDDP
14
BOOT
13
UGATE
4
VDD
12
PHASE
9
LGATE
6 PGOOD
PGND 8
1
EN/DEM
5
FB
R5
12K
GND
7
11
CS
3
VOUT
C3
0.1mF
R4
18K
A Product Line of
Diodes Incorporated
AP3591
VIN =12V
C1
10 mF
Q1
L
1.0 mH
Q2
VOUT =1.05V
C4
220 mF
Symbol
C1
C4
L
Q1
Q2
Value
10µF/25V
220µF/6.3V
1.0µH
N-MOSFET
N-MOSFET
BOM
Description
ESR < 4mΩ @400kHz
ESR < 9mΩ @300kHz
DCR < 4mΩ, IMAX = 24A
IDMAX = 30A, RDS(ON) =
IDMAX = 30A, RDS(ON) =
Manufacturer
Murata
Sanyo
Vishay
Infineon
Infineon
Part Number
GRM31CR61E106KA12
6SVPE220M
IHLP5050CEER1R0M01
BSC119N03S
BSC119N03S
AP3591
Document number: DS36906 Rev. 1 - 2
2 of 18
www.diodes.com
March 2014
© Diodes Incorporated


Part Number AP3591
Description SINGLE PHASE SYNCHRONOUS BUCK CONTROLLER
Maker Diodes
Total Page 18 Pages
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