The R2J20656ANP multi-chip module incorporates a high-side MOS FET, low-side MOS FET, and MOS-FET driver
in a single QFN package. The on and off timing of the power MOS FET is optimized by the built-in driver, making this
device suitable for large-current buck converters. The chip also incorporates a high-side bootstrap switch, eliminating
the need for an external SBD for this purpose.
Features
Compliant with Intel 6 6 DrMOS Specification.
Built-in power MOS FET suitable for Notebook, Desktop, Server application.
Low-side MOS FET with built-in SBD for lower loss and reduced ringing.
Built-in driver circuit which matches the power MOS FET
Built-in tri-state input function which can support a number of PWM controllers
High-frequency operation (above 1 MHz) possible
VIN operating-voltage range: 27 Vmax
Large average output current (Max. 3 5 A)
Achieve low power dissipation
Controllable driver: Remote on/off
Zero current detection for a diode emulation operation
Double thermal protection: Thermal Warning & Thermal Shutdown
Built-in bootstrapping Switch
Small package: QFN40 (6 mm 6 mm 0.95 mm)
Pb-free/Halogen-Free
Outline
THWN
DISBL#
ZCD_EN#
PWM
Integrated Driver-MOS FET (DrMOS)
QFN40 package 6 mm × 6 mm
VINGHBOOTVCIN
MOS FET Driver
CGND VDRVGLPGND
VSWH
110
40
Driver
Pad
Low-side MOS Pad
31
3021
(Bottom view)
High-side
MOS Pad
11
20
R07DS0201EJ0100 Rev.1.00 Page 1 of 15
Jan 25, 2011
Page 2
R2J20656ANP Preliminary
Block Diagram
Driver Chip
THWN
DISBL#
ZCD_EN#
PWM
THWNTHDN
2 μA
CGND
CGND
VCIN
160 k
VCIN
Input Logic
(TTL Level)
(3 state in)
Zero
Current
Det.
VCIN
UVL
VDRV
Level Shifter
Overlap
Protection.
& Logic
BOOTGH
Boot
SW
VDRV
VIN
High Side
MOS FET
20 k
VSWH
Low Side
MOS FET
35 k
PGND
GLCGND
Notes: 1. Truth table for the DISBL# pin2. Truth table for the ZCD_EN# pin
3. Output signal from the UVL block 4. Output signal from the THWN block
VHVL
For active
VCIN
Thermal Warning
Logic Level
"H"
"L"
Normal
operating
Thermal
Warning
T
(°C)
IC
TwarnHTwarnL
UVL output
Logic Level
"H"
For shutdown
"L"
5. Truth table for the THDN block
Driver IC Temp. Driver Chip Status
< 150°C Enable (GL, GH = "Active")
> 150°C
Shutdown (GL, GH = "L")
(latch-off)
R07DS0201EJ0100 Rev.1.00 Page 2 of 15
Jan 25, 2011
Page 3
R2J20656ANP Preliminary
Pin Arrangement
VIN
VIN
VIN
VSWHGHCGND
1098765432
11
VINPWM
12
VIN
13
VIN
14
VIN
VSWH
PGND
PGND
PGND
PGND
PGNDVSWH
15
16
17
18
19
20
VIN
VSWH
21 22 23 24 25 26 27 28 29 30
PGND
PGND
PGND
PGND
PGND
PGND
BOOT
VDRV
CGND
PGND
PGND
VCIN
VSWH
(Top view)
Note: All die-pads (three pads in total) should be soldered to PCB.
Pin Description
ZCD_EN#
1
40
39
38
37
36
35
34
33
32
31
VSWH
DISBL#
THWN
CGND
GL
VSWH
VSWH
VSWH
VSWH
Pin Name Pin No. Description Remarks
ZCD_EN# 1 Zero current detection enable
When asserted "L" signal, zero crossing
detection is enabled
VCIN 2 Control input voltage (+5 V input)Driver Vcc input
VDRV 3 Gate supply voltage (+5 V input)5 V gate drive
BOOT 4 Bootstrap voltage pin To be supplied +5 V through internal switch
CGND 5, 37, Pad Control signal ground Should be connected to PGND externally
GH 6 High-side gate signal Pin for monitor
VIN 8 to 14, Pad Input voltage
VSWH 7, 15, 29 to 35, Pad Phase output/Switch output
PGND 16 to 28 Power ground
GL 36 Low-side gate signal Pin for monitor
THWN 38 Thermal warning Thermal warning when over 115°C
DISBL# 39 Signal disable
R07DS0201EJ0100 Rev.1.00 Page 3 of 15
Jan 25, 2011
Page 4
R2J20656ANP Preliminary
Absolute Maximum Ratings
(Ta = 25°C)
Item Symbol Rating Units Note
Pt(25) 25 Power dissipation
Pt(110) 8
Average output current Iout 35 A
VIN(DC) –0.3 to +27 2 Input voltage
VIN(AC) 30
Supply voltage & Drive voltage VCIN & VDRV –0.3 to +6 V 2
VSWH(DC) 27 2 Switch node voltage
VSWH(AC) 30
VBOOT(DC) 32 2 BOOT voltage
VBOOT(AC) 36
I/O voltage
THWN/THDN current Ithwn, Ithdn 0 to 1.0 mA
Operating junction temperature Tj-opr –40 to +150 °C
Storage temperature Tstg –55 to +150 °C
Notes: 1. Pt(25) represents a PCB temperature of 25°C, and Pt(110) represents 110C.
2. Rated voltages are relativ e to voltages on the CGND and PGND pins.
3. For rated current, (+) indicates inflow.
4. The specification values indicated "AC" are limited within 10 ns.
5. VCIN + 0.3 V < 6 V
Vpwm, Vdisble,
Vlsdbl, Vthwn
–0.3 to VCIN + 0.3 V 2, 5
W 1
V
2, 4
V
2, 4
V
2, 4
Safe Operating Area
45
40
35
30
25
20
VOUT = 1.3 V
15
VIN = 12 V
10
VCIN = 5 VL = 0.45 μH
Average Output Current (A)
5
Fsw = 1 MHz
0
0255075100125150175
PCB Temperature (°C)
R07DS0201EJ0100 Rev.1.00 Page 4 of 15
Jan 25, 2011
Page 5
R2J20656ANP Preliminary
Recommended Operating Condition
Item Symbol Rating Units Note
Input voltage VIN 4.5 to 22 V
Supply voltage & Drive voltage VCIN & VDRV 4.5 to 5.5 V
Note: 1. Reference values for design. Not 100% tested in production.
VCIN start threshold VH 4.1 4.3 4.5 V
VCIN shutdown threshold VL 3.6 3.8 4.0 V
UVLO hysteresis dUVL — 0.5 — V VH – VL
VCIN operating current I
— 49 — mA
CIN
f
PWM
= 1 MHz,
Ton_pwm = 120 ns
VCIN disable current I
— — 150 A
CIN-DISBL
DISBL# = 0 V,
PWM = ZCD_EN# = Open
PWM input high level V
PWM input low level V
PWM input resistance R
PWM input tri-state range V
Shutdown hold-off time t
Enable level V
Disable level V
Input current I
THDN on resistance R
4.0 — —V 5.0 V PWM interface
H-PWM
— — 0.8 V
L-PWM
6.5 12.525 kPWM = 1 V
IN-PWM
1.5 — 3.2 V 5.0 V PWM interface
IN-tri
HOLD-OFF
ENBL
DISBL
DISBL
THDN
1
*
— 150 — ns
2.0— — V — — 0.8 V
— 2.0 5.0 A DISBL# = 1 V
*10.2 0.5 1.0 kDISBL# = 0.2 V
ZCD disable level Vzcddisbl 2.0 — — V
ZCD enable level Vzcden — — 0.8 V
Input current Izcden –52 –25 –12 A ZCD_EN# = 1 V
Warning temperature T
Temperature hysteresis T
THWN on resistance R
THWN leakage current I
Shutdown temperature Tstdn *
*1100 115 130 °C Driver IC temperature
THWN
*1— 15 — °C
HYS
*1 0.2 0.5 1.0 kTHWN = 0.2 V
THWN
— — 1.0 A THWN = 5 V
LEAK
1
130 150 — °C Driver IC temperature
R07DS0201EJ0100 Rev.1.00 Page 5 of 15
Jan 25, 2011
Page 6
R2J20656ANP Preliminary
Typical Application
4.5 to 22 V
+5 V
PWM
Control
Circuit
PWM1
PWM2
PWM3
PWM4
VCIN
THWN
DISBL#
ZCD_EN#
PWM
CGNDGL
VCIN
THWN
DISBL#
ZCD_EN#
PWM
CGNDGL
VCIN
THWN
DISBL#
ZCD_EN#
PWM
CGNDGL
BOOT
R2J20656
ANP
BOOT GHVDRV
R2J20656
ANP
BOOT
R2J20656
ANP
GHVDRV
VIN
VSWH
PGND
VIN
VSWH
PGND
+1.3 V
GHVDRV
VIN
VSWH
Power GND Signal GND
PGND
VCIN
THWN
DISBL#
ZCD_EN#
PWM
CGNDGL
BOOT
R2J20656
ANP
GHVDRV
VIN
VSWH
PGND
R07DS0201EJ0100 Rev.1.00 Page 6 of 15
Jan 25, 2011
Page 7
R2J20656ANP Preliminary
Pin Connection
+5 V
(4.5 to 22 V)
10 μF × 4
VIN
PGND
0.1 μF
0 to 10 Ω
10 987654321
11
12
13
14
VIN
15
VSWHGL
16
PGND
17
18
19
20
VIN
VIN
PAD
R2J20656ANP
GH
VSWH
VSWH
PAD
BOOT
CGND
CGND
PAD
VDRV
PGND
21 22 23242526272829 30
1.0 μF
VCIN
CGND
VSWH
VSWH
CGND
ZCD_EN#able Signal INPUT
40
39
ZCD_EN#
38
37
36
35343332
31
CGND
PWM
DISBL#
THWN
0.45 μH
PWM INPUT
10 kΩ
+5 V
10 kΩ
+5 V
Thermal Shutdown
Thermal Warning
Vout
Power GND Signal GND
PGND
PGND
R07DS0201EJ0100 Rev.1.00 Page 7 of 15
Jan 25, 2011
Page 8
R2J20656ANP Preliminary
Test Circuit
I
IN
Vinput
Vcont
5 V pulse
A
V
V
IN
I
CIN
A
V
V
CIN
VCIN
DISBL#
BOOT
VIN
R2J20656ANP
VDRV
ZCD_EN#
PWM
CGND
GH
VSWH
PGND
GL
Electric
load
I
O
Note: P
= IIN × VIN + I
IN
P
= IO × V
OUT
Efficiency = P
P
(DrMOS) = PIN – P
LOSS
Ta = 27°C
O
OUT
CIN
/ P
× V
IN
CIN
OUT
Averaging
circuit
Average Output Voltage
V
V
O
R07DS0201EJ0100 Rev.1.00 Page 8 of 15
Jan 25, 2011
R07DS0201EJ0100 Rev.1.00 Page 10 of 15
Jan 25, 2011
Page 11
R2J20656ANP Preliminary
Description of Operation
The DrMOS multi-chip module incorporates a high-side MOS FET, low-side MOS FET, and MOS-FET driver in a
single QFN package. Since the parasitic inductance between each chip is extremely small, the module is highly suitable
for use in buck converters to be operated at high frequencies. The control timing between the high-side MOS FET, lowside MOS FET, and driver is optimized so that high efficiency can be obtained at low output-voltage.
VCIN & DISBL#
The VCIN pin is connected to the UVL (under-voltage lockout) module, so that the driver is disabled as long as VCIN
is 4.3 V or less. On cancellation of UVL, the driver remains enabled until the UVL input is driven to 3.8 V or less. The
signal on pin DISBL# also enables or disables the circuit.
Voltages from –0.3 V to VCIN can be applied to the DISBL# pin, so on/off control by a logic IC or the use of a resistor,
etc., to pull the DISBL# line up to VCIN are both possible.
VCIN DISBL# Driver State
L Disable (GL, GH = L)
H L Disable (GL, GH = L)
H H Active
H Open Disable (GL, GH = L)
The pulled-down MOS FET, which is turned on when internal IC temperature becomes over thermal shutdown level, is
connected to the DISBL# pin. The detailed function is described inTHDN section.
PWM & ZCD_EN#
The PWM pin is the signal input pin for the driver chip. The input-voltage range is –0.3 V to (VCIN + 0.3 V). When the
PWM input is high, the gate of the high-side MOS FET (GH) is high and the gate of the low-side MOS FET (GL) is
low.
PWM GH GL
L L H
H H L
The ZCD_EN# pin is the Zero Current Detection Operation Enable pin for "Diode Emulation Mode (DEM)" when
ZCD_EN# is low. This function improves light load efficiency by preventing negative inductor current from output
capacitor. Driver IC monitors inductor current and when inductor current crosses zero, driver IC turn off Low side MOS
FET automatically.
Figure 1.1 shows the Typical high side and low side gate switching and Inductor current (IL) during Continuous
Conduction Mode (CCM), and figure 1.2 shows DEM when asserting Zero Current Detection Enable signal.
ZCD_EN# pin is internally pulled up to VCIN with 160 k resistor. When Zero current detection function is not used,
keep this pin open or pulled up to VCIN.
CCM Operation (ZCD_EN# = "H" or Open mode)
IL
PWM
GH
GL
Figure 1.1 Typical Signals during CCM
R07DS0201EJ0100 Rev.1.00 Page 11 of 15
Jan 25, 2011
Page 12
R2J20656ANP Preliminary
DEM Operation (ZCD_EN# = "L" in Light load condition)
IL
0 A
PWM
GH
GL
Figure 1.2 Typical Signals during DEM
The PWM input is TTL level and has hysteresis. When the signal route from the control IC is high impedance, the tristate function turns off the high- and low-side MOS FETs. This function operates when the PWM input signal stays in
the input hysteresis window for 150 ns (typ.). Afte r the tri- st at e mode has been ente red a nd GH an d GL ha ve become
low, a PWM input voltage of 4.0 V or more is required to make the circuit return to normal operation.
150 ns (t
HOLD-OFF
)
PWM
GH
GL
3.2 V
1.5 V
150 ns (t
HOLD-OFF
)
PWM
GH
GL
3.2 V
1.5 V
150 ns (t
HOLD-OFF
)
150 ns (t
HOLD-OFF
Figure 2 PWM Shutdown-Hold Time Signal
)
R07DS0201EJ0100 Rev.1.00 Page 12 of 15
Jan 25, 2011
Page 13
R2J20656ANP Preliminary
The equivalent circuit for the PWM-pin input is shown in the next figure. M1 is in the ON state during normal
operation; after the PWM input signal has stayed in the hysteresis window for 150 ns (typ.) and the tri-state detection
signal has been driven high, the transistor M1 is turned off.
When VCIN is powered up, M1 is started in the OFF state regardless of PWM Low or Open state. After PWM is
asserted high signal, M1 becomes ON and shifts to normal operation.
VCIN
M1
14.5 k
Tri-state
PWM Pin
Input
Logic
12.5 k
detection signal
To internal control
Figure 3 Equivalent Circuit for the PWM-pin Input
THWN & THDN
This device has two level thermal detection, one is thermal warning and the other is thermal shutdown function.
This Thermal Warning feature is the indication of the high temperature status.
THWN is an open drain logic output signal and need to connect a pull-up resistor(ex.51 k) to THWN for Systems
with the thermal warning implementation.
When the chip temperature of the internal driver IC becomes over 115°C, Thermal warning function operates.
This signal is only indication for the system controller and does not disable DrMOS operation.
When thermal warning function is not used, keep this pin open.
115100
Thermal
warning
TIC (°C)
THWN outputLogic Level
"H"
Normal
operating
"L"
Figure 4 THWN Trigger Temperature
R07DS0201EJ0100 Rev.1.00 Page 13 of 15
Jan 25, 2011
Page 14
R2J20656ANP Preliminary
r
THDN is an internal thermal shutdown signal when driver IC becomes over 150°C.
This function makes High Side MOS FET and Low Side MOS FET turn off for the device protection from abnormal
high temperature situation and at the same time DISBL# pin is pulled low internally to give notice to the system
controller. Once thermal shutdown function operates, driver IC keeps DISBL# pin pulled low until VCIN becomes
under UVL level (3.8 V).
Figure 5 shows the example of two types of DISBL# connection with the system controller signal.
Figure 5.1 THDN Signal to the System ControllerFigure 5.2 ON/OFF Signal from the System Controlle
MOS FET
The MOS FETs incorporated in R2J20656ANP are highly suitable for synchr on ous- rect i fi cati on buck conversion. For
the high-side MOS FET, the drain is connected to the VIN pin and the source is connected to the VSWH pin. For the
low-side MOS FET, the drain is connected to the VSWH pin and the source is connected to the PGND pin.
R07DS0201EJ0100 Rev.1.00 Page 14 of 15
Jan 25, 2011
R07DS0201EJ0100 Rev.1.00 Page 15 of 15
Jan 25, 2011
Page 16
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