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Details, datasheet, quote on part number:SP6654EU
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| Part: | SP6654EU |
| Category: | Power Management => Regulators => Buck Regulators |
| Description: | Iout = 800mA ;; Min. = 2.7V ;; Max. = 5.5V ;; Iq = 20µA ;; Fixed Outputs = N/a ;; Output Range = Adj ;; Freq. (kHz) = PFM ;; Efficiency = 98% ;; Package = 10 Pin Msop |
| Company: | Sipex Corporation |
| Datasheet: | Download SP6654EU datasheet File size : 164 kB |
| Request For quote: | Find where to buy SP6654EU
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Datasheet text preview:
®
SP6654
Ideal for portable designs powered with Li Ion battery
High Efficiency 800mA Synchronous Buck Regulator
FEATURES Ultra-low 20µA Quiescent Current 98% Efficiency Possible 800mA Output Current 2.7V to 5.5V Input Voltage Range Output Adjustable Down to 1.0V No External FET's Required 1.25A Inductor Peak Current Limit 100% Duty Ratio Low Dropout Operation 80µA Light Load Quiescent Current in Dropout Logic Shutdown Control Programmable UVLO Small 10-Pin MSOP Package Power Good Indicator
PVIN 1 VIN 2 PWRGD 3 D1 4 D0 5
10 LX
SP6654
10 Pin MSOP
9 PGND 8 GND 7 VOUT 6 FB
APPLICATIONS PDA's DSC's MP3 Players USB Devices Point of Use Power
DESCRIPTION The SP6654 is a 800mA synchronous buck regulator which is ideal for portable applications that use a Li-Ion or 3 cell alkaline/NiCD/NiMH input. The SP6654's proprietary control loop, 20µA light load quiescent current, and 0.3 power switches provide excellent efficiency across a wide range of output currents. As the input battery supply decreases towards the output voltage the SP6654 seamlessly transitions into 100% duty ratio operation further extending useful battery life. The SP6654 is protected against overload and short circuit conditions with a precise inductor peak current limit. Other features include programmable under voltage lockout, externally programmed output voltage down to 1.0V, logic level shutdown control, and an open drain power good indicator when VOUT is above 93% of its programmed value. TYPICAL APPLICATION SCHEMATIC
2.7V to 5.5V Input
VI
L1 10µH 10 RVIN CVIN 1µF
VOUT 800mA
VO
CIN 22µF 1M
SP6654
PVIN VIN PWRGD LX PGND GND
COUT 22µF CF RF
22pF
PWRGD
D1 D0
D1 D0
VOUT FB RI 200K
Rev. 9/16/03
SP6654 High Efficiency 800mA Synchronous Buck Regulator
© Copyright 2003 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
PVIN,VIN .... 6V All other pins ..... -0.3V to VIN+0.3V 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 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 SPECIFICATIONS
VIN=PVIN=VSDN=3.6V, VOUT=VFB, IO = 0mA, TAMB = -40°C to +85°C, typical values at 27°C unless otherwise noted. The denotes the specifications which apply over full operating temperature range -40°C to +85°C, unless otherwise specified. PARAMETER Input Voltage Operating Range Minimum Output Voltage FB Set Voltage, Vr 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 PMOS Switch Resistance NMOS Switch Resistance Inductor Current Limit LX Leakage Current Power Efficiency Minimum Guaranteed Load Current VIN Quiescent Current VIN Shutdown Current VOUT Quiescent Current VOUT Shutdown Current UVLO Undervoltage Lockout Threshold, VIN falling UVLO Hysteresis PWRGD Low Output Voltage PWRGD Leakage Current PWRGD Rising Threshold PWRGD Hysterisis D1,D0 Leakage Current D1,D0 Input Threshold Voltage FB Leakage Current MIN UVLO 1.0 0.784 TYP MAX 5.5 UNITS V V V 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 = 2V IPMOS = 200mA INMOS = 200mA VFB=0.5V D0=D1=0 VOUT=2.5V, IO=200mA VOUT=3.3V, IO=800mA CONDITIONS Result of IQ measurement at VIN=PVIN=5.5V
0.800
0.816
1.5 1.6
2.25 2.4 100 0.3 0.3 1.25 0.01 96 92 900 20 1 2 1 2.70 2.85 3.00 120
±5 ±4 3.0 3.2
% V*µs V*µs ns A µA % mA
1.0
0.6 0.6 1.50 3
800
VOUT=3.3V, VIN=3.6V and VIN= 5.5V D1=D0=0V VOUT = 3.3V D1=D0=0V D1=0V, D0=VIN D1=VIN, D0=0V D1=VIN, D0=VIN VIN=3.3V, ISINK=1mA VPWRGD =3.6V With Respect to FB Set Voltage
2.55 2.70 2.85
30 500 5 500 2.85 3.00 3.15 0.4 1 -4 500 1.8 100
µA nA µA nA V mV V µA % mV nA V V nA
-11
0.60
-7 80 1 0.90 1.25 1
High to Low Transition Low to High Transition FB=1V
Rev. 9/16/03
SP6654 High Efficiency 800mA Synchronous Buck Regulator
© Copyright 2003 Sipex Corporation
2
PIN DESCRIPTION
PIN NUMBER 1 2 3 PIN NAME PVIN VI N PWRGD DESCRIPTION Input voltage power pin. Inductor charging current passes through this pin. Internal supply voltage. Control circuitry powered from this pin. Open drain Power Good indicator. If VFB is less than 750mV this pin is pulled to ground. When VFB is above 750mV this pin is open. Connect a resistor from this pin to VIN or VOUT to create a logic signal. Digital mode control input. See Table I for definition. Digital mode control input. See Table I for definition. External feedback network input connection. Connect a resistor from FB to ground and FB to VOUT to set the output voltage. This pin regulates to the internal bandgap reference voltage of 0.8V. Output voltage sense pin. Used by the timing circuit to set minimum on and off times. Internal ground pin. Control circuitry returns current to this pin. Power ground pin. Synchronous rectifier current returns through this pin. Inductor switching node. Inductor tied between this pin and the output capacitor to create regulated output voltage.
4 5 6
D1 D0 FB
7 8 9 10
VOUT GND PG N D LX
D1 0 0 1 1
D0 0 1 0 1 Shutdown. All internal circuitry is disabled and the power switches are opened. Device enabled, falling UVLO threshold =2.70V Device enabled, falling UVLO threshold =2.85V Device enabled, falling UVLO threshold =3.00V
Table 1. Operating Mode Definition
FUNCTIONAL DIAGRAM
Vin
DRVON VOLOW TONOVER MIN Ton Internal Supply TONOVER Vos VOLOW REF + -REF' + VR A M P Min Ton Min Ton = KON/(VIN -VOUT) M DRVON
R S Q
VOUT
P V IN
1
OVR_I
+
DRIVER
-
C
ILIM/M
_
Q
-
C
FB
+
- FB'
RST OVR_I
LX
DRVON REF=800mV Ref Block
UVLO
D0 D1
+
One-Shot =100ns BLANK
-
C
Zero_X
PGND
TOFF = KOFF/VOUT
ILIM/M
OVR_I 750mV
GND
+ C
PWRGD
DRVON BLANK BLANK = Tblank(=100ns) or Toff = Koff/Vout
FB
UVLO
Rev. 9/16/03
SP6654 High Efficiency 800mA Synchronous Buck Regulator
© Copyright 2003 Sipex Corporation
3
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