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RT8207LZQW Datasheet(PDF) 5 Page - Richtek Technology Corporation

Part # RT8207LZQW
Description  Complete DDRII/DDRIII/Low-Power DDRIII/DDRIV Memory Power Supply Controller
PDF  27 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT8207LZQW Datasheet(HTML) 5 Page - Richtek Technology Corporation

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5
DS8207L/M-08 September 2016
www.richtek.com
RT8207L/M
©
Copyright 2016 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
Functional Pin Description
Pin No.
Pin Name
Pin Function
WQFN-24L 4x4
WQFN-20L 3x3
1
1
VTTGND
Power ground output for VTT LDO.
2
2
VTTSNS
Voltage sense input for VTT LDO. Connect to the terminal of
the VTT LDO output capacitor.
3,
25 (Exposed Pad)
3,
21 (Exposed Pad)
GND
Analog ground. The exposed pad must be soldered to a large
PCB and connected to GND for maximum thermal dissipation.
4
--
MODE
Output discharge mode setting. Connect to VDDQ for tracking
discharge. Connect to GND for non-tracking discharge.
Connect to VDD for no discharge.
5
4
VTTREF
Buffered reference output.
6, 7, 17
--
NC
No internal connection.
8
5
VDDQ
Reference input for VTT and VTTREF. Discharge current
sinking terminal for VDDQ non-tracking discharge. Output
voltage feedback input for VDDQ output if the FB pin is
connected to VDD or GND.
9
6
FB
VDDQ output setting. Connect to GND for DDR3 (VVDDQ =
1.5V) power supply. Connect to VDD for DDR2 (VVDDQ = 1.8V)
power supply. Or connect to a resistive voltage divider from
VDDQ to GND to adjust the output of PWM from 0.75V to 3.3V.
10
7
S3
S3 signal input.
11
8
S5
S5 signal input
12
9
TON
Set the UGATE on time through a pull-up resistor connecting to
VIN. Output discharge mode setting pin for RT8207M. Connect
RTON to VIN for non-tracking discharge.
13
10
PGOOD
Power good open drain output. In High state when VDDQ
output voltage is within the target range.
14
11
VDD
Supply input for analog supply.
15
12
VDDP
Supply input for LGATE gate driver.
16
13
CS
Current limit threshold setting input. Connect to VDD through
the voltage setting resistor.
18
14
PGND
Power ground for low side MOSFET.
19
15
LGATE
Low side gate driver output for VDDQ.
20
16
PHASE
Switch node. External inductor connection for VDDQ and
behave as the current sense comparator input for Low Side
MOSFET RDS(ON) sensing.
21
17
UGATE
High side gate driver output for VDDQ.
22
18
BOOT
Boost flying capacitor connection for VDDQ.
23
19
VLDOIN
Power supply for VTT LDO.
24
20
VTT
Power output for VTT LDO.



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