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SP6655 Datasheet Preview

SP6655 Datasheet

High Efficiency 400mA Synchronous Buck Regulator Ideal for portable designs powered with Li Ion battery

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® SP6655
High Efficiency 400mA Synchronous Buck Regulator
Ideal for portable designs powered with Li Ion battery
FEATURES
98% Efficiency Possible
Small 10-Pin DFN Package
Ultra-low 20µA Quiescent Current
625mA Inductor Peak Current Limit
Guaranteed Minimum 400mA Output
Current
2.7V to 5.5V Input Voltage Range
Output Adjustable Down to 1.0V
100% Duty Ratio Low Dropout
Operation
80µA Light Load Quiescent Current in
Dropout
PVIN 1
VIN 2
BLON 3
D1 4
D0 5
10 LX
SP6655 9 PGND
10 Pin DFN
8 GND
7 VOUT
6 FB
Now Available in Lead Free Packaging
APPLICATIONS
Cell Phones
PDA's
DSC's
MP3 Players
USB Devices
Point of Use Power
DESCRIPTION
The SP6655 is a 400mA synchronous buck regulator which is ideal for portable applications that
use a Li-Ion or 3 cell alkaline/NiCD/NiMH input. The SP6655’s proprietary control loop, 20µA light
load quiescent current, and 0.3power switches provide excellent efficiency across a wide range
of output currents. As the input battery supply decreases towards the output voltage the SP6655
seamlessly transitions into 100% duty ratio operation further extending useful battery life. The
SP6655 is protected against overload and short circuit conditions with a precise inductor peak
current limit. Other features include programmable under voltage lockout and low battery
detection, externally programmed output voltage down to 1.0V, logic level shutdown control, and
140°C over temperature shutdown.
TYPICAL APPLICATION SCHEMATIC
2.7V to 5.5V Input
VI
CIN
10µF
1M
BLON
10
RVIN
CVIN
1µF
D1
D0
SP6655
PVIN
LX
VIN PGND
BLON
GND
D1 VOUT
D0 FB
L1
10µH
COUT
10µF
VOUT
400mA
VO
CF
RF 22pF
RI
200K
Date: 7/12/04
SP6655 High Efficiency 400mA Synchronous Buck Regulator
1
© Copyright 2004 Sipex Corporation




Sipex

SP6655 Datasheet Preview

SP6655 Datasheet

High Efficiency 400mA Synchronous Buck Regulator Ideal for portable designs powered with Li Ion battery

No Preview Available !

PVIN,VIN .............................................................................................. 6V
All other pins .............................................................. -0.3V to V +0.3V
IN
PVIN, PGND, LX current ........................................................................ 2A
Storage Temperature .................................................. -65 °C to 150 °C
Operating Temperature ................................................. -40°C to +85°C
Lead Temperature (Soldering, 10 sec) ....................................... 300 °C
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at
these ratings or any other above those indicated in the operation
sections of the specifications below is not implied. Exposure to
absolute maximum rating conditions for extended periods of time may
affect reliability.
ELECTRICAL CHARACTERISTICS
VIN=UVIN=VSDN=3.6V, VOUT=VFB, IO = 0mA, TAMB = -40°C to +85°C, typical values at 27°C unless otherwise noted.
PARAMETER
Input Voltage Operating
Range
Minimum Output Voltage
FB Set Voltage, Vr
MIN
UVLO
1.0
0.784
Overall Accuracy
(-40°C to 85°C)
(0°C to 70°C)
On-Time Constant - KON
Min, TON=KON/(VIN-VOUT)
Off-Time Constant - KOFF
Min, TOFF=KOFF/VOUT
Off-Time Blanking
Turn On Time
PMOS Switch Resistance
NMOS Switch Resistance
Inductor Current Limit
Power Efficiency
1.5
1.6
500
Minimum Guaranteed Load
Current
VIN Quiescent Current
VIN Shutdown Current
VOUT Quiescent Current
VOUT Shutdown Current
UVLO
Undervoltage Lockout
Threshold, VIN falling
UVLO hysteresis
Battlo Trip Voltage, VIN falling
Battlo Trip Voltage Hysteresis
BLON Low Output Voltage
BLON Leakage Current
Over-Temperature
Rising Trip Point
Over-Temperature Hysteresis
D1,D0 Leakage Current
D1,D0 Input Threshold Voltage
400
2.55
2.70
2.85
265
0.60
FB Leakage Current
LX Leakage
TYP
0.800
2.25
2.4
100
200
0.3
0.3
625
96
92
500
20
1
2
1
2.70
2.85
3.00
40
300
9
140
14
1
0.90
1.25
1
3
MAX UNITS CONDITIONS
5.5 V Result of IQ measurement at VIN=PVIN=5.5V
0.816
±5
±4
3.0
3.2
400
0.6
0.6
750
V
V
%
V*µs
V*µs
ns
µs
mA
%
mA
25°C, IO=200mA Close Loop. LI = 10µH,
COUT = 22µF
Measured at VIN=5.5V, no load and
VIN=3.6V, 200mA load, Close Loop
Close Loop, LI = 10µH,COUT = 22µF
Inductor current limit tripped, VFB=0.5V
Measured at VOUT=1V
400mA Load
IPMOS = 200mA
INMOS = 200mA
VFB=0.5V
VOUT=2.5V, IO=200mA
VOUT=3.3V, IO=400mA
30
500
5
500
2.85
3.00
3.15
335
0.4
1
µA VOUT=3.3V, VIN=3.6V and VIN= 5.5V
nA D1=D0=0V
µA VOUT = 3.3V
nA D1=D0=0V
D1=0V, D0=VIN
V D1=VIN, D0=0V
D1=VIN, D0=VIN
mV
mV Measured as VIN-VOUT
mV
V VIN=3.3V, ISINK=1mA
µA VBLON=3.6V
°C
°C
500 nA
V High to Low Transition
1.8 V Low to High Transition
100 nA FB=1V
5 µA D1,D0=0V, VIN=3.6V
LX=0V,LX=VIN+0.2V
Date: 7/12/04
SP6655 High Efficiency 400mA Synchronous Buck Regulator
2
© Copyright 2004 Sipex Corporation


Part Number SP6655
Description High Efficiency 400mA Synchronous Buck Regulator Ideal for portable designs powered with Li Ion battery
Maker Sipex
Total Page 16 Pages
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