Step-Down Converter. RP6002 Datasheet

RP6002 Converter. Datasheet pdf. Equivalent

RP6002 Datasheet
Recommendation RP6002 Datasheet
Part RP6002
Description Synchronous Step-Down Converter
Feature RP6002; Preliminary RP6002 3A, 23V, 340kHz Synchronous Step-Down Converter General Description The RP6002.
Manufacture RICHPOWER
Datasheet
Download RP6002 Datasheet




RICHPOWER RP6002
Preliminary
RP6002
3A, 23V, 340kHz Synchronous Step-Down Converter
General Description
The RP6002 is a high-efficiency synchronous step-down
DC/DC converter that can deliver up to 3A output current
from 4.75V to 23V input supply. The RP6002's current
mode architecture and external compensation allow the
transient response to be optimized over a wide range of
loads and output capacitors. Cycle-by-cycle current limit
provides protection against shorted outputs and soft-start
eliminates input current surge during start-up. The RP6002
also provides output under voltage protection and thermal
shutdown protection. The low current (<3µA) shutdown
mode provides output disconnection, enabling easy power
management in battery-powered systems.
Ordering Information
RP6002
Package Type
SP : SOP-8 (Exposed Pad-Option 1)
Operating Temperature Range
G : Green (Halogen Free with Commer-
cial Standard)
Note :
Richpower 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.
Features
4.75V to 23V Input Voltage Range
3A Output Current
Integrated N-MOSFET Switches
Current Mode Control
Fixed Frequency Operation : 340kHz
Output Adjustable from 0.925V to 20V
Up to 95% Efficiency
Programmable Soft-Start
Stable with Low-ESR Ceramic Output Capacitors
Cycle-by-Cycle Over Current Protection
Input Under Voltage Lockout
Output Under Voltage Protection
Thermal Shutdown Protection
Thermally Enhanced SOP-8 (Exposed Pad) Package
RoHS Compliant and Halogen Free
Applications
Industrial and Commercial Low Power Systems
Computer Peripherals
LCD Monitors and TVs
Green Electronics/Appliances
Point of Load Regulation of High-Performance DSPs,
FPGAs and ASICs.
Pin Configurations
(TOP VIEW)
BOOT
VIN
SW
GND
8
27
GND
36
9
45
SS
EN
COMP
FB
SOP-8 (Exposed Pad)
RP6002-00P July 2009
1



RICHPOWER RP6002
RP6002
Preliminary
Typical Application Circuit
VIN
4.75V to 23V
REN
100k
2 VIN
BOOT 1
CIN
10µFx2
RP6002
SW 3
7 EN
8 SS
CSS
0.1µF
4,
Exposed Pad(9)
GND
FB 5
COMP 6
CBOOT L1
10nF 10µH
CC
3.9nF
RC
6.8k
R1
26.1k
R2
10k
VOUT
3.3V/3A
COUT
22µFx2
Table 1. Recommended Component Selection
VOUT (V)
15
R1 (k)
153
R2 (k)
10
RC (k)
30
10
97.6 10
20
8
76.8 10
15
5
45.3 10
13
3.3
26.1 10
6.8
2.5
16.9 10
6.2
1.8
9.53 10
4.3
1.2 3 10 3
CP
NC
CC (nF)
3.9
3.9
3.9
3.9
3.9
3.9
3.9
3.9
L (µH)
33
22
22
15
10
6.8
4.7
3.6
COUT (µF)
22 x 2
22 x 2
22 x 2
22 x 2
22 x 2
22 x 2
22 x 2
22 x 2
Functional Pin Description
Pin No.
1
2
Pin Name
Pin Function
BOOT
Bootstrap for High-Side Gate Driver. Connect a 10µF or greater ceramic capacitor
from the BOOT pin to SW pin.
VIN
Voltage Supply Input. The input voltage range is from 4.75V to 23V. A suitable
large capacitor must be bypassed with this pin.
3 SW Switching Node. Connect the output LC filter between the SW pin and output load.
4,
9 (Exposed Pad)
GND
5 FB
6 COMP
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
Output Voltage Feedback Input. The feedback reference voltage is 0.925V
typically.
Compensation Node. This pin is used for compensating the regulation control
loop. A series RC network is required to be connected from COMP to GND. If it is
needed, an additional capacitor should be connected from COMP to GND.
Enable Input. A logic-high enables the converter, a logic low forces the converter
7 EN into shutdown mode reducing the supply current to less than 3µA. For automatic
startup, connect this pin to VIN with a 100kpull up resistor.
Soft-Start Control Input. The soft-start period can be set by connecting a capacitor
8 SS from the SS to GND. A 0.1µF capacitor sets the soft-start period to 13ms typically.
To disable the soft-start feature, leave SS unconnected.
2 RP6002-00P July 2009



RICHPOWER RP6002
Function Block Diagram
Preliminary
VIN
Internal
Regulator
Oscillator
340kHz/110kHz
Current Sense
Slope Comp Amplifier
+
Shutdown
Comparator
1.2V +
VA VCC
Foldback
- Control
10k
EN - 0.5V +
2.5V +
-
3V Lockout
Comparator
UV
Comparator
VCC
-
SQ
+R
-
Current
Comparator
Q
7µA
SS
0.925V
+
+
EA
-
FB COMP
RP6002
VA
100m
85m
BOOT
SW
GND
RP6002-00P July 2009
3







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