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SP6654EU-L/TR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
4
Date: 2/1/05 SP6654 High Efficiency 800mA Synchronous Buck Regulator © Copyright 2005 Sipex Corporation
PIN DESCRIPTION
PIN NUMBER PIN NAME DESCRIPTION
1PV
IN
Input voltage power pin. Inductor charging current passes through this pin.
2V
IN
Internal supply voltage. Control circuitry powered from this pin.
3 PWR
GD
Open drain Power Good indicator. If V
FB
is less than 750mV this pin is
pulled to ground. When V
FB
is above 750mV this pin is open. Connect
a resistor from this pin to V
IN
or V
OUT
to create a logic signal.
4D1Digital mode control input. See table I for definition.
5D0Digital mode control input. See table I for definition.
6FBExternal feedback network input connection. Connect a resistor from
FB to ground and FB to V
OUT
to set the output voltage. This pin
regulates to the internal bandgap reference voltage of 0.8V.
7V
OUT
Output voltage sense pin. Used by the timing circuit to set minimum on
and off times.
8 GND Internal ground pin. Control circuitry returns current to this pin.
9P
GND
Power ground pin. Synchronous rectifier current returns through this pin.
10 LX Inductor switching node. Inductor tied between this pin and the output
capacitor to create regulated output voltage.
FUNCTIONAL DIAGRAM
F
B
Zero_X
DRVON
QR
QS
Min Ton
PWR
GD
D0
PV
IN
OVR_I
MIN Ton
OVR_IK
OFF
/V
OUT
Vin
LX
T
OFF
=
UVLO
BLANK = Tblank(=100ns) or Toff = Koff/Vout
ILIM/M
REF
1
VOLOW
_
FB
+-
V
RAMP
RST
P
GND
TSD
BLANK
750mV
+
-
C
UVLO
TONOVER
Internal Supply
REF'
OVR_I
V
OUT
+
-
C
DRVON
BLANK
ILIM/M
D1
VOLOW
+
-
C
TONOVER
Min Ton =
K
ON
/(
V
IN
-
V
OUT
)
Ref
One-Shot
DRVON
+
-
C
Block
FB'
GND
REF
M
+-
Vos
DRIVER
DRVON
=100ns
5
Date: 2/1/05 SP6654 High Efficiency 800mA Synchronous Buck Regulator © Copyright 2005 Sipex Corporation
60
65
70
75
80
85
90
95
100
0.1 1.0 10.0 100.0 1000.0
ILoad (mA)
Efficiency (%)
Vi=3.6V
Vi=3.9V
Vi=4.2V
Vi=5.0V
3.20
3.25
3.30
3.35
3.40
0 200 400 600 800 1000
ILoad (mA)
Vout (V)
Vi=3.6V
Vi=3.9V
Vi=4.2V
Vi=5.0V
0
100
200
300
400
500
3.0 3.3 3.6 3.9 4.2
Vin (V)
Iin (uA)
Tamb = 85°C
Ta mb = 25°C
Tamb = -40°C
1.45
1.47
1.49
1.51
1.53
1.55
0 200 400 600 800 1000
ILoad (mA)
Vout (V)
Vi=3.6V
Vi=3.9V
Vi=4.2V
Vi=5.0V
0
10
20
30
40
50
3.0 3.3 3.6 3.9 4.2
Vin (V)
Iin (µA)
Tamb = 85°C
Tamb = 25°C
Tamb = -40°C
100
1.0 10.0 100.0 1000.0
ILoad (mA)
Efficiency (%)
95
90
85
80
75
70
65
60
0.
Vi=3.6V
Vi=3.9V
Vi=4.2V
Vi=5.0V
Figure 1. Efficiency vs Load, V
OUT
= 3.3V
Figure 2. Efficiency vs Load, V
OUT
= 1.5V
Figure 3. Line/Load Rejection, V
OUT
= 3.3V
Figure 4. Line/Load Rejection, V
OUT
= 1.5V
Figure 5. No Load Battery Current, V
OUT
=3.3V
Figure 6. No Load Battery Current, V
OUT
=1.5V
TYPICAL PERFORMANCE CHARACTERISTICS
Refer to the typical application schematic, T
AMB
= +27°C
6
Date: 2/1/05 SP6654 High Efficiency 800mA Synchronous Buck Regulator © Copyright 2005 Sipex Corporation
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
3.6 3.9 4.2 4.5 4.8 5.1 5.4
Vin (V)
Kon (V*usec)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
3.0 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4
Vin (V)
Kon (V*usec)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
3.6 3.9 4.2 4.5 4.8 5.1 5.4
Vin (V)
Koff (V*usec)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
3.0 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4
Vin (V)
Koff (V*usec)
Figure 7. K
ON
vs V
IN
, V
OUT
=3.3V Figure 8. K
ON
vs V
IN
, V
OUT
=1.5V
Figure 9. K
OFF
vs V
IN
, V
OUT
=3.3V
Figure 10. K
OFF
vs V
IN
, V
OUT
=1.5V
TYPICAL PERFORMANCE CHARATERISTICS
Refer to the typical application schematic, T
AMB
= +27°C
0.0
100.0
200.0
300.0
400.0
500.0
600.0
700.0
3.5 4.0 4.5 5.0
Vin (V)
Frequency (KHz)
Vout = 3.3V
Measured
Vout = 3.3V
Calculated
0.0
100.0
200.0
300.0
400.0
500.0
600.0
700.0
3.4 3.8 4.2 4.6 5.0
Vin (V)
Frequency (KHz)
Vout = 1.5V
Measured
Vout = 1.5V
Calculated
Figure 11. Ripple Frequency vs. V
IN
, I
OUT
=600mA,
V
OUT
=3.3V
Figure 12. Ripple Frequency vs. V
IN
, I
OUT
=600mA,
V
OUT
=1.5V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

SP6654EU-L/TR

Mfr. #:
Buy SP6654EU-L/TR
Manufacturer:
MaxLinear
Description:
Switching Voltage Regulators High Eff 800mA Synchronous
Lifecycle:
New from this manufacturer.
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