Step-Down Converter. RP6001 Datasheet

RP6001 Converter. Datasheet pdf. Equivalent

RP6001 Datasheet
Recommendation RP6001 Datasheet
Part RP6001
Description Step-Down Converter
Feature RP6001; Preliminary RP6001 3A, 24V, 400kHz Step-Down Converter General Description The RP6001 is a high v.
Manufacture RICHPOWER
Datasheet
Download RP6001 Datasheet




RICHPOWER RP6001
Preliminary
RP6001
3A, 24V, 400kHz Step-Down Converter
General Description
The RP6001 is a high voltage buck converter that can
support the input voltage range from 4.75V to 24V and
the output current can be up to 3A. Current Mode operation
provides fast transient response and eases loop
stabilization.
The chip provides protection functions such as cycle-by-
cycle current limiting and thermal shutdown protection.
In shutdown mode, the regulator draws 25µA of supply
current. The RP6001 is available in a SOP-8 (Exposed
Pad) surface mount package.
Ordering Information
RP6001
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
Wide Operating Input Range : 4.75V to 24V
Adjustable Output Voltage Range : 0.92V to 15V
Output Current up to 3A
25µA Low Shutdown Current
Power MOSFET : 0.1
High Efficiency up to 95%
400kHz Fixed Switching Frequency
Stable with Low ESR Output Ceramic Capacitors
Thermal Shutdown Protection
Cycle-By-Cycle Over Current Protection
RoHS Compliant and Halogen Free
Applications
Distributive Power Systems
Battery Charger
DSL Modems
Pre-regulator for Linear Regulators
Pin Configurations
(TOP VIEW)
BOOT
VIN
SW
GND
8
27
GND
3 96
45
SS
EN
COMP
FB
Typical Application Circuit
SOP-8 (Exposed Pad)
VIN
4.75V to 24V
Chip Enable
CIN
10µFx2
2 VIN
7 EN
BOOT 1
RP6001
SW 3
8 SS
CSS
0.1µF
4,
Exposed Pad (9) GND
FB 5
COMP 6
CBOOT L1
10nF 10µH
D1
B330A
CC
2.7nF
RC
22k
R1
25.8k
R2
10k
VOUT
3.3V/3A
COUT
22µFx2
CP
NC
RP6001-01P July 2009
1



RICHPOWER RP6001
RP6001
Preliminary
Table 1. Recommended Component Selection
VOUT (V)
15
R1 (k)
153
R2 (k)
10
RC (k)
62
10
100 10
54
8 77 10 40
5 43 10 27
3.3
25.8
10
22
2.5 17 10 16
1.8 9.1 10 13
1.2 3 10 13
CC (nF)
0.82
1.2
1.5
2.2
2.7
2.2
2.2
2.2
L (uH)
22
22
15
15
10
6.8
4.7
2.2
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
3
4,
9 (Exposed Pad)
Pin Name
Pin Function
BOOT
High-Side Gate Drive Boost Input. BOOT supplies the drive for the high-side
N-MOSFET switch. Connect a 10nF or greater capacitor from SW to BOOT to
power the high side switch.
Power Input. VIN supplies the power to the IC, as well as the step-down converter
VIN switches. Bypass VIN to GND with a suitable large capacitor to eliminate noise on
the input to the IC.
Power Switching Output. SW is the switching node that supplies power to the
SW output. Connect the output LC filter from SW to the output load. Note that a
capacitor is required from SW to BOOT to power the high-side switch.
GND
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
5
FB
Feedback Input. FB senses the output voltage to regulate said voltage. The
feedback reference voltage is 0.92V typically.
Compensation Node. COMP is used to compensate the regulation control loop.
6
COMP
Connect a series RC network from COMP to GND to compensate the regulation
control loop. In some cases, an additional capacitor from COMP to GND is
required.
Enable Input. EN is a digital input that turns the regulator on or off. Drive EN
7 EN higher than 1.4V to turn on the regulator, lower than 0.4V to turn it off. If the EN pin
is open, it will be pulled to high by internal circuit.
Soft-Start Control Input. SS controls the soft start period. Connect a capacitor
8 SS from SS to GND to set the soft-start period. A 0.1µF capacitor sets the soft-start
period to 10ms.
2 RP6001-01P July 2009



RICHPOWER RP6001
Function Block Diagram
Preliminary
VIN
VCC
1µA
Internal
Regulator
Oscillator
400kHz/120kHz
Current Sense
Slope Comp Amplifier
+
-
10k
EN
VA VCC
-
Foldback
Control
1.1V
+
Shutdown
0.5V
Comparator
+
-
3V VCC
UV
Comparator
+ Logic
-
Current
10µA
Comparator
0.92V +
SS +- EA
Gm = 680µA/V
FB COMP
RP6001
VA
BOOT
SW
GND
Absolute Maximum Ratings (Note 1)
Supply Voltage, VIN ----------------------------------------------------------------------------------------- 0.3V to 26V
Switching Voltage, SW ------------------------------------------------------------------------------------- 0.3V to VIN + 0.3V
BOOT Voltage ------------------------------------------------------------------------------------------------ (VSW 0.3V) to (VSW + 6V)
The Other Pins ----------------------------------------------------------------------------------------------- 0.3V to 6V
Power Dissipation, PD @ TA = 25°C
SOP-8 (Exposed Pad) -------------------------------------------------------------------------------------- 1.333W
Package Thermal Resistance (Note 4)
SOP-8 (Exposed Pad), θJA -------------------------------------------------------------------------------- 75°C/W
Junction Temperature --------------------------------------------------------------------------------------- 150°C
Lead Temperature (Soldering, 10 sec.) ----------------------------------------------------------------- 260°C
Storage Temperature Range ------------------------------------------------------------------------------- 65°C to 150°C
ESD Susceptibility (Note 2)
HBM (Human Body Mode) --------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ---------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 3)
Supply Voltage, VIN ----------------------------------------------------------------------------------------- 4.75V to 24V
Enable Voltage, VEN ----------------------------------------------------------------------------------------- 0V to 5.5V
Junction Temperature Range ------------------------------------------------------------------------------ 40°C to 125°C
Ambient Temperature Range ------------------------------------------------------------------------------ 40°C to 85°C
RP6001-01P July 2009
3







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