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DC/DC Regulator. SC4624A Datasheet

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DC/DC Regulator. SC4624A Datasheet






SC4624A Regulator. Datasheet pdf. Equivalent




SC4624A Regulator. Datasheet pdf. Equivalent





Part

SC4624A

Description

4A Integrated FET Synchronous Step down DC/DC Regulator



Feature


POWER MANAGEMENT Description Low Input Voltage, High Efficiency, 4A Integrated www.DataSheet4U.com FET Synchronous St ep down DC/DC Regulator Features u VIN Range: 2.3 – 5.5V u 4A Continuous Out put Current u Adjustable Output Voltage 0.5V to Vin u Low RDS(ON) integrated F ETs: 75mΩ and 47mΩ u Up to 95% Effici ency u Synchronizable and Programmable Frequency: 200kHz – 2M.
Manufacture

Semtech

Datasheet
Download SC4624A Datasheet


Semtech SC4624A

SC4624A; Hz u Power Good Monitor u <1µA of Shutd own Current u Programmable Soft Start u Programmable Current Limit u Over Temp erature protection u -40 to +85 °C Amb ient Temperature Range u 4X4mm MLPQ-20 packages- WEEE and RoHS compliant SC46 24A The SC4624A is a highly integrated synchronous stepdown DC/DC regulator d esigned for low input voltage range of 2.3V to 5.5 Volts. I.


Semtech SC4624A

t can deliver 4A continuous output curre nt with the output voltage as low as 0. 5 Volts. The internal low RDS(ON) synch ronous power switches eliminate the nee d for external Schottky diode while del ivering overall converter efficiency up to 95%. A power good pin is available to monitor the output voltage status. O perating frequency is adjustable from 2 00 kHz to 2MHz wit.


Semtech SC4624A

h a single resistor and it can be synchr onized to an external clock. The SC4624 A offers adjustable current limit, soft start and over temperature protection to safeguard the device under extreme o perating conditions. The soft start pro vides a controlled output voltage ramp up at startup. When a logic low is appl ied to the Enable pin, the SC4624A ente rs the shutdown mo.

Part

SC4624A

Description

4A Integrated FET Synchronous Step down DC/DC Regulator



Feature


POWER MANAGEMENT Description Low Input Voltage, High Efficiency, 4A Integrated www.DataSheet4U.com FET Synchronous St ep down DC/DC Regulator Features u VIN Range: 2.3 – 5.5V u 4A Continuous Out put Current u Adjustable Output Voltage 0.5V to Vin u Low RDS(ON) integrated F ETs: 75mΩ and 47mΩ u Up to 95% Effici ency u Synchronizable and Programmable Frequency: 200kHz – 2M.
Manufacture

Semtech

Datasheet
Download SC4624A Datasheet




 SC4624A
SC4624A
Low Input Voltage, High Efficiency, 4A Integrated
FET Synchronous Step down DwwCw/.DDatCaShReeet4gU.ucolmator
POWER MANAGEMENT
Description
Features
The SC4624A is a highly integrated synchronous step-
down DC/DC regulator designed for low input voltage
range of 2.3V to 5.5 Volts. It can deliver 4A continuous
output current with the output voltage as low as 0.5 Volts.
The internal
eliminate the
lonweedRDfSo(OrN)
synchronous power switches
external Schottky diode while
delivering overall converter efficiency up to 95%.
A power good pin is available to monitor the output voltage
status. Operating frequency is adjustable from 200 kHz
to 2MHz with a single resistor and it can be synchronized
to an external clock.
The SC4624A offers adjustable current limit, soft start and
over temperature protection to safeguard the device under
extreme operating conditions. The soft start provides a
controlled output voltage ramp up at startup. When a
logic low is applied to the Enable pin, the SC4624A enters
the shutdown mode and it consumes less than 1µA of
current.
The SC4624A is available in 4x4 MLPQ-20 and it is rated
over -40°C to +85°C ambient temperature range.
u VIN Range: 2.3 – 5.5V
u 4A Continuous Output Current
u Adjustable Output Voltage 0.5V to Vin
u
u
LUopwtoR9DS5(O%N)
integrated
Efficiency
FETs:
75mΩ
and
47mΩ
u Synchronizable and Programmable Frequency:
200kHz – 2MHz
u Power Good Monitor
u <1µA of Shutdown Current
u Programmable Soft Start
u Programmable Current Limit
u Over Temperature protection
u -40 to +85 °C Ambient Temperature Range
u 4X4mm MLPQ-20 packages- WEEE and RoHS
compliant
Applications
Low Voltage Distributed DC-DC Converters
Telecommunication Power Supplies
Portable Equipment
xDSL
Typical Application Circuit
5
D
Vin
C9
C
4
R4
3
C11
R5
R6
R2
C3
PVIN
SYNC/EN
PGOOD
VCC
PH
FB
SC4624A
SS
B ISET
FS COMP
C7 C5 R3 R11
21
L1
R7
R8
R1 R9
C1
C2
Vout
C8
C4
D
C
B
A
Revision: July 10, 2008
5
43

A
21
www.semtech.com




 SC4624A
SC4624A
POWER MANAGEMENT
Pi5n Configura4 tion
3
Top View
D
2
PVIN
120
16
15
PGND
C PVIN
PGND
ISET T AGND
SS VCC
FS 5 6
1011
FB
B
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1 Ordering Information
Device
D
SC4624AMLTRT (1) (2)
Top Mark
SC
4624A
Package
MLPQ-20
SC4624AEVB-MLPQ
Evaluation Board
Notes:
(1) Available in tape and reel only. A reel contains 3,000 devices for MLPQ-20
packCage.
(2) Available in lead-free package only. Device is WEEE and RoHS compliant.
B
A
5
20Pin MLPQ
θJA= 29°C/W; θJC= 2.5°C/W.
432
A
1
2008 Semtech Corp.

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 SC4624A
SC4624A
POWER MANAGEMENT
www.DataSheet4U.com
Absolute Maximum Ratings
Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the
Electrical Characteristics section is not implied.
Parameter
Symbol
Maximum
Units
Supply Voltage
PVIN to VCC
PVIN, VCC
-0.3 to 6
+/- 0.3
V
V
FB, COMP, ISET, SYNC/EN, FS, SS, PGOOD to AGND
-0.3 to VCC+ 0.3
V
PGND to AGND
+/- 0.3
V
PHASE Voltage to PGND
PHASE Pulse Voltage to PGND Tpulse < 50ns
Storage Temperature Range
Junction Temperature
IR Reflow Temperature
ESD Protection Level(1)
Note:
1) Tested in accordance to JEDEC standard JESD22-A114B.
Recommended Operating Conditions
The Performance is not guarantied if exceeding the specifications below.
Parameter
Symbol
VPHASE
VPHASE
TSTG
TJ
TP
VESD
Conditions
-0.3 to PVIN+ 0.3
-3 to PVIN+ 2
-40 to 150
150
260
2
V
V
°C
°C
°C
kV
Min Typ Max Units
Power Supply
Input Voltage Operating Range
VIN
Ambient Temperature Range
TA
Junction Temperature
TJ
Max. Output Current
IOUTMAX
Electrical Characteristics
Unless otherwise specified, VIN= VCC=SYNC/EN=3.3V, ROSC=51.1KΩ, RISET=27.4KΩ, TA = -40°C to 85°C
Parameter
Symbol
Conditions
2.3 5.5 V
-40 85 °C
-40 125 °C
0 4A
Min Typ Max Units
Power Supply
Start Threshold Voltage, UVLO
Hysteresis Voltage, UVLO
Supply Current, Shutdown
Supply Current, Operating
2008 Semtech Corp.
VIUV
VIUVHY
ISD
IQswitching
IQL
VIN Rising
VSYNC = 0V
FB = COMP, No Load
FB = 0.6V, No Load

2 2.25 V
120 mV
0.2 1 µA
7 10 mA
3.5 7 mA
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