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RT8202L PDF даташит

Спецификация RT8202L изготовлена ​​​​«Richtek» и имеет функцию, называемую «(RT8202L/M) Single Synchronous Buck Controller».

Детали детали

Номер произв RT8202L
Описание (RT8202L/M) Single Synchronous Buck Controller
Производители Richtek
логотип Richtek логотип 

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RT8202L Даташит, Описание, Даташиты
RT8202L/M
Single Synchronous Buck Controller
General Description
The RT8202L/M PWM controller provides the high
efficiency, excellent transient response, and high DC output
accuracy needed for stepping down high voltage batteries
to generate low voltage CPU core, I/O, and chipset RAM
supplies in notebook computers.
The constant-on-time PWM control scheme handles wide
input/output voltage ratios with ease and provides 100ns
instant-onresponse to load transients while maintaining
a relatively constant switching frequency.
The RT8202L/M achieves high efficiency at a reduced cost
by eliminating the current-sense resistor found in
traditional current mode PWMs. Efficiency is further
enhanced by its ability to drive very large synchronous
rectifier MOSFETs. The RT8202L is available in a
WQFN-16L 4x4 package and the RT8202M is available in
a WQFN-16L 3x3 package.
Ordering Information
RT8202L/M
Package Type
QW : WQFN-16L 4x4 (W-Type)
QW : WQFN-16L 3x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Z : ECO (Ecological Element with
Halogen Free and Pb free)
L : WQFN-16L 4x4
M : WQFN-16L 3x3
Note :
Richtek 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.
Features
z Ultra-High Efficiency
z Resistor Programmable Current Limit by Low Side
RDS(ON) Sense (Lossless Limit)
z 4700ppm/°C RDS(ON) Current Sensing
z Quick Load Step Response within 100ns
z 1% VFB Accuracy over Line and Load
z Adjustable 0.75V to 3.3V Output Voltage Range
z 3V to 26V Battery Input Voltage Range
z Resistor Programmable Frequency
z Integrated Bootstrap Switch
z Over Voltage Protection
z Under Voltage Protection
z Voltage Ramp Soft-Start
z Built In Soft Discharge Output
z Power Good Indicator
z RoHS Compliant and 100% Halogen Free
Applications
z Notebook Computers
z CPU Core Supply
z Chipset/RAM Supply as Low as 0.75V
Pin Configurations
(TOP VIEW)
16 15 14 13
VOUT 1
12 UGATE
VDD 2
FB 3
PGOOD 4
GND
17
11 PHASE
10 OC
9 VDDP
56 78
WQFN-16L 4x4 (RT8202L)/
WQFN-16L 3x3 (RT8202M)
DS8202L/M-04 April 2011
www.richtek.com
1
Free Datasheet http://www.Datasheet4U.com









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RT8202L Даташит, Описание, Даташиты
RT8202L/M
Marking Information
RT8202LGQW
EK= : Product Code
EK=YM
DNN
YMDNN : Date Code
RT8202LZQW
EK YM
DNN
EK : Product Code
YMDNN : Date Code
RT8202MGQW
JJ= : Product Code
JJ=YM
DNN
YMDNN : Date Code
RT8202MZQW
JJ YM
DNN
JJ : Product Code
YMDNN : Date Code
Typical Application Circuit
RTON
VDDP
5V
PGOOD
CCM/DEM
C1
R1
RT8202L/M
16 TON
9 VDDP
R2
2 VDD
C2
BOOT 13
UGATE 12
PHASE 11
LGATE 8
4 PGOOD
15 EN/DEM
OC 10
FB 3
R3
R4
RILIM
6 , 17 (Exposed Pad) GND
7 PGND
VOUT 1
* Optional
VIN
3V to 26V
C4
C3
Q1
L1
Q2 R5*
C5*
R6
R7
VOUT
C6*
C7*
C8
www.richtek.com
2
DS8202L/M-04 April 2011
Free Datasheet http://www.Datasheet4U.com









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RT8202L Даташит, Описание, Даташиты
Function Block Diagram
RT8202L/M
VOUT
TON
SS (Internal)
TRIG
On-time
Compute
1-SHOT
+
G+ M
--
Comp
-
+
FB
VDD
GND
115% VREF
70% VREF
Latch
+ OV S1 Q
-
Latch
+ UV S1 Q
-
90% VREF
-
+
SS Ramp
Thermal
Shutdown
EN/DEM
R
SQ
PWM
Min. TOFF
Q TRIG
1-SHOT
Diode
Emulation
DRV
DRV
20µA
+
-
BOOT
UGATE
PHASE
VDDP
LGATE
PGND
OC
PGOOD
DS8202L/M-04 April 2011
www.richtek.com
3
Free Datasheet http://www.Datasheet4U.com










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