XRP7740ILB-0X18-F Exar Corporation, XRP7740ILB-0X18-F Datasheet - Page 7

• Manufacturer Part Number: XRP7740ILB-0X18-F
• Description: IC CTRLR PWM/LDO STP-DWN 40TQFN
• Manufacturer: Exar Corporation
• Series: -r

Specifications of XRP7740ILB-0X18-F

• Topology: Step-Down (Buck) Synchronous (4), Linear (LDO) (1)
• Function: Any Function
• Number Of Outputs: 5
• Frequency - Switching: 1.5MHz
• Voltage/current - Output 1: Controller
• Voltage/current - Output 2: Controller
• Voltage/current - Output 3: Controller
• W/led Driver: No
• W/supervisor: No
• W/sequencer: Yes
• Voltage - Supply: 6.5 V ~ 20 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: *
• Package / Case: *
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 1016-1697

ORDERING INFORMATION
“YY” = Year – “WW” = Work Week – “X” = Lot Number
© 2011 Exar Corporation
XRP7708ILB- F
XRP7708ILBTR-F
XRP7740ILB- F
XRP7740ILBTR-F
XRP7740ILB-0X180-F
XRP7740ILBTR-0X18-F -40°C≤T
XRP7708EVB
XRP7740EVB
VOUT1-VOUT4
GPIO0-GPIO3
GPIO4_SDA,
BST1-BST4
GPIO5_SCL
GH1-GH4
GL1-GL4
LX1-LX4
LDOOUT
ENABLE
Name
Part Number
DVDD
AGND
AGND
DGND
Pin Number
Exposed Pad
34,30,17,22
33,28,19,24
34,29,23,18
32,27,20,25
12,13,14,15
3,4,5,6
7,8
10
11
40
2
9
XRP7708 Evaluation Board
XRP7740 Evaluation Board
-40°C≤T
-40°C≤T
-40°C≤T
-40°C≤T
-40°C≤T
Junction Temp
Range
Input for powering the internal digital logic. This pin should be connected to AVDD.
Digital Ground. This pin should be connected to the ground plane at the exposed pad with
a separate trace.
Analog Ground. This pin should be connected to the ground plane at the exposed pad with
a separate trace
Output pin of the low side gate driver. Connect directly to the respective gate of an
external N-channel MOSFET.
Output pin of the high side gate driver. Connect directly to the respective gate of an
external N-channel MOSFET.
Lower supply rail for the high-side gate driver (GHx). Connect this pin to the switching
node at the junction between the two external power MOSFETs and the inductor. These
pins are also used to measure voltage drop across bottom MOSFETs in order to provide
output current information to the control engine.
High side driver supply pin(s). Connect BST to an external boost diode and a capacitor as
shown in the front page diagram.
The high side driver is connected between the BST pin and LX pin.
These pins can be configured as inputs or outputs to implement custom flags, power good
signals and enable/disable controls. A GPIO pin can also be programmed as an input clock
synchronizing IC to external clock. Refer to the “GPIO Pins” Section and the “External
Clock Synchronization” Section for more information.
I
GPIO functions in applications when I
Voltage sense.
Connect to the output of the corresponding power stage.
Output of the Standby LDO. It can be configured as a 5V or 3.3V output. A compensation
capacitor should be used on this pin [see Application Note].
If ENABLE is pulled high, the chip powers up (logic reset, registers configuration loaded,
etc.). If pulled low for longer than 100us, the XRP7708/40 is placed into shutdown. See
applications section for proper sequencing of this pin.
Analog Ground. Connect to analog ground (as noted above for pin 11).
J
J
J
J
J
J
≤+125°C
≤+125°C
≤+125°C
≤+125°C
≤+125°C
≤+125°C
2
C serial interface communication pins. These pins can be re-programmed to perform
Q
Q
u
u
XRP7708ILB
XRP7708ILB
XRP7740ILB
XRP7740ILB
XRP7740ILB
XRP7740ILB
a
a
Marking
YYWW X
YYWW X
YYWW X
YYWW X
YYWW X
YYWW X
d
d
0X18
0X18
C
C
h
h
a
a
n
n
n
7/28
n
40-pin TQFN
40-pin TQFN
40-pin TQFN
40-pin TQFN
40-pin TQFN
40-pin TQFN
e
e
Package
l
l
D
D
i
i
g
g
2
i
i
C bus is not used.
t
t
Description
a
a
l
3K/Tape & Reel
3K/Tape & Reel
3K/Tape & Reel
l
P
P
Quantity
Packing
X
X
W
W
Bulk
Bulk
Bulk
R
R
M
M
P
P
S
S
7
7
t
t
7
7
e
e
0
0
p
p
Halogen Free
Halogen Free
Halogen Free
Halogen Free
Halogen Free
Halogen Free
8
8
D
D
Note 1
o
o
a
a
w
w
n
n
n
d
n
d
C
C
X
X
o
o
R
R
n
n
Default I
P
Address
P
t
t
Rev. 1.2.0
r
r
0X18
0X18
7
7
o
o
7
7
l
l
l
l
e
e
4
4
2
r
r
C
0
0
s
s