900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




  Richtek Technology Electronic Components Datasheet  

RT9605A Datasheet

Triple-Channel Synchronous-Rectified Buck MOSFET Driver

No Preview Available !

Preliminary
RT9605A
Triple-Channel Synchronous-Rectified Buck MOSFET Driver
General Description
The RT9605A is a high frequency, triple-channel
synchronous-rectified buck MOSFET driver specifically
designed to drive six power N-MOSFETs. The part is
promoted to pair with RichTek's multiphase buck PWM
controller family for high-density power supply
implementation. The output drivers of RT9605A can
www.DataSheet4U.com
efficiently switch power MOSFETs at frequency 300kHz
typically. Operating in higher frequency should consider
the thermal dissipation carefully. Each driver of RT9605A
is capable to drive a 3nF load in 30/40ns rising/falling
time with little propagation delay from input transition to
the gate of the power MOSFET. The device implements
bootstrapping on the upper gate with only an external
capacitor and a diode required. This reduces circuit
complexity and allows the use of higher performance, cost
effective N-MOSFETs. All drivers incorporate adaptive
shoot-through protection to prevent upper and lower
MOSFETs from conducting simultaneously and shorting
the input supply. The RT9605A also detects the fault
condition during initial start-up prior to the multi-phase
PWM controller takes control. As a result, the input supply
will latch into the shutdown state. The RT9605A comes
to a small footprint package with VQFN-24L 4x4 package.
Ordering Information
RT9605A
Package Type
QV : VQFN-24L 4x4 (V-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Note :
Richtek Pb-free and Green products are :
`RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
`Suitable for use in SnPb or Pb-free soldering processes.
`100% matte tin (Sn) plating.
Features
z Drive Six N-MOSFETs for 3-Phase Buck PWM Control
z Adaptive Shoot-Through Protection
z Support High Switching Frequency
z Fast Output Rise/Fall Time
z Propagation Delay 40ns
z Tri-State Input for Bridge Shutdown
z Upper MOSFET Direct Short Protection
z Small 24-Lead VQFN Package
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z CPU Core Voltage Supplies on Motherboard
z High Frequency Low Profile DC-DC Converters
z High Current Low Voltage DC-DC Converters
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area, otherwise visit our website for detail.
Pin Configurations
(TOP VIEW)
24 23 22 21 20 19
UGATE1 1
18 GND
BOOT1 2
17 UGATE2
NC 3
PWM1 4
GND
16 BOOT2
15 PVCC3
PWM2 5
GND 6
14 LGATE3
25 13 GND
7 8 9 10 11 12
VQFN-24L 4x4
DS9605A-05 August 2007
All brandname or trademark belong to their owner respectively
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT9605A Datasheet

Triple-Channel Synchronous-Rectified Buck MOSFET Driver

No Preview Available !

RT9605A
Preliminary
Typical Application Circuit
PHASE2
L1
0.5uH
12V
1uH
R19 2.2
C16
3.3uF
VIN Q3
Q1 Q2
C1
33pF
Optional
R2 C2
C8
1000uF
5V
C4
4.7uF
C9
1uF
C10 to C13
1500uF x 4
D1
C15
C14
1uF
R18
0
1uF
12V
R20
0
17 19 21 20 3
R1
15k
C3
10nF
www.DataSheet4U.com
R3 3k
VID5
VID0
VID1
VID2
VID3
VID4
R4 110k
R5 56k
R6 27k
R7 13k
R8 6.8k
R9 3.3k
R10 5.1k
RDROOP 6 PI
2 DACQ
R11
1.8k
1 DACFB
9 PGOOD
R12
10k
3.3V
12V
R13 27k
R14
3k
RT8800
GND
R15
16k
Optional
RICOMMON2
PWM3 15
PWM2 14
ISP3 10
ISP2 11
R16
Optional
C5 1uF
Optional
C6
1uF
Optional
430
RICOMMON1
R17
R17
C7
1uF
VCORE
16 BOOT2
7 PWM3
PHASE3
5 PWM2
4 PWM1
2 BOOT1
R
RT9605A
GND
R25
LGATE3 14 0
PVCC3 15
C21
1uF
PHASE3 11 12V
UGATE3 10
R26
0
BOOT3
9
C22
1uF
D3
12V
Q8
Q9
VIN
Q7 PHASE3
C23
3.3nF
R27
2.2
L2
0.5uH
PHASE2
R
PHASE1
R
1
C17
1uF
D2
24 22 23 8 R23 10
R21
0
12V C18
1uF
R22
0 C19 1uF
Q4 Q5
12V VIN
R24
2.2
C20
Q6
3.3nF
5VSB
PHASE1
L3
0.5uH
C24 to C35
1000uF x 12
C36 to C39
10uF x 4
VCORE
Functional Pin Description
UGATE1 (Pin 1), UGATE2 (Pin 17), UGATE3 (Pin 10)
Upper Gate Drive Output. Should be connected to the
upper MOSFET gate.
BOOT1 (Pin 2), BOOT2 (Pin 16), BOOT3 (Pin 9)
Floating bootstrap supply pin for the upper gate drive.
Connect the bootstrap capacitor between this pin and the
PHASE pin. The bootstrap capacitor provides the charge
to turn on the upper MOSFET.
NC (Pin 3)
No connected.
PWM1 (Pin 4), PWM2 (Pin 5), PWM3 (Pin 7)
PWM input control signal. Connect this pin to the PWM
output of the controller. If the PWM signal enters and
remains within the shutdown window, are both UGATE
and LGATE are drived low, disabling the output MOSFETs.
GND [Pin 6, 12, 13, 18, Exposed Pad (25)]
Chip power ground. The exposed pad must be soldered
to a large PCB and connected to GND for maximum power
dissipation.
VDD (Pin 8)
Supply Input. Connect to +5V stand-by power. Place a
bypass capacitor between this pin and GND.
PHASE1 (Pin 24), PHASE2 (Pin 19), PHASE3 (Pin 11)
Upper driver return. Should be connected to the common
node of upper and lower MOSFETs. The PHASE voltage
is monitored for adaptive shoot-through protection.
LGATE1 (Pin 23), LGATE2 (Pin 20), LGATE3 (Pin 14)
Lower Gate Drive Output. Should be connected to the lower
MOSFET gate.
PVCC1 (Pin 22), PVCC2 (Pin 21), PVCC3 (Pin 15)
Supply Input. Connect to +12V supply. Place a bypass
capacitor between this pin and PGND.
www.richtek.com
2
All brandname or trademark belong to their owner respectively
DS9605A-05 August 2007


Part Number RT9605A
Description Triple-Channel Synchronous-Rectified Buck MOSFET Driver
Maker Richtek Technology Corporation
PDF Download

RT9605A Datasheet PDF






Similar Datasheet

1 RT9605A Triple-Channel Synchronous-Rectified Buck MOSFET Driver
Richtek Technology Corporation
2 RT9605B Triple-Channel Synchronous-Rectified Buck MOSFET Driver
Richtek Technology Corporation





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