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SP6649 Datasheet Preview

SP6649 Datasheet

Ultra-low Quiescent Current / High Efficiency Boost DC-DC Regulator

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® SP6649
Ultra-low Quiescent Current,
High Efficiency Boost DC-DC Regulator
FEATURES
Ultra-low 12µA Quiescent Current
700mA Output Current at 2.6VIN, 3.3VOUT
94% Efficiency Possible
Wide Input Voltage Range: 0.85V to 4.5V
3.3V Fixed Output and adjustable 2.5V to
5.0V Output Range
Internal Synchronous Rectifier for High
Efficiency
0.3 Charging Switch, 0.3 Synchro-
nous Rectifier
Anti-Ringing Inductor Switch
Programmable Inductor Peak Current
Logic Shutdown Control
Under Voltage Lock-Out, 0.62V
Programmable Low Battery Detect
Small 10 pin MSOP Package
VBATT 1
LBI 2
LBON 3
RLIM 4
SHDN 5
Top View
10 pin MSOP
Tja=113°C/W
10 VOUT
9 LX
8 PGND
7 GND
6 FB
APPLICATIONS
Digital Still Cameras
MP3 Players
PDA's
Pagers
Handheld Portable Devices
Medical Monitors
DESCRIPTION
The SP6649 is an ultra-low quiescent current, high efficiency step-up DC-DC converter ideal for
single and dual cell alkaline, or Li-Ion battery applications such as digital still cameras, PDAs,
MP3 players, and other portable devices. The SP6649 combines the high delivery associated
with PWM control, and the low quiescent current and excellent light-load efficiency of PFM control.
The SP6649 features 12µA quiescent current, synchronous rectification, a 0.3 charging switch,
anti-ringing inductor switch, programmable low battery detect, under-voltage lockout and
programmable inductor peak current. The device can be controlled by a 1nA active LOW
shutdown pin.
VBATT
C1
+
47uF
LBI
LBON
SHDN
RLIM
1.87K
L1 10uH
1 VBATT
VOUT 10
2 LBI SP6649 LX 9
3 LBON
PGND 8
4
RLIM
7
GND
5
SHDN
6
FB
3.3Vout
C4
1uF
R1
205K
C3
47pF
+ C2
47uF
R2
124K
C1 = C2 = Kemet T49C476K010AS, L1 = Sumida CDRH5D28-100
R1 = 374K for 5VOUT
Figure 1. Typical Application Circuit
TBD
Figure 2. Maximum Load Current in Operation
Rev:001 Date:11/20/03
SP6649 Ultra-low Quiescent Current, High Efficiency Boost DC-DC Regulator
1
© Copyright 2002 Sipex Corporation




Sipex

SP6649 Datasheet Preview

SP6649 Datasheet

Ultra-low Quiescent Current / High Efficiency Boost DC-DC Regulator

No Preview Available !

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.
LX, Vo, VBATT , LBON, FB to GND pin ................................. -0.3 to 6.0V
SHDN, LBI ............................................................ -0.3V to VBATT +0.5V
Vo, GND, LX Current .................................................................... 1.3A
Reverse VBATT Current ............................................................... 220mA
Forward VBATT Current ............................................................... 500mA
Storage Temperature .................................................. -65 °C to 150°C
Operating Temperature ................................................ -40°C to +85°C
Lead Temperature (Soldering, 10 sec) ....................................... 300 °C
ESD Rating ........................................................................... 2kV HBM
SPECIFICATIONS
VBATT=VSHDN = 1.3V, VFB=0V, ILOAD = 0mA, TAMB= -40°C to +85°C, VOUT = +3.3V, typical values at 27°C unless otherwise
noted.
PARAMETER
Input Voltage Operating Range, VBATT
Under Voltage Lock-out/UVLO
Start-up Input Voltage, VBATT
Output Voltage, VO
Quiescent Current into VO, IQO
Quiescent Current into VBATT, IQB
Shutdown Current into VO, ISDO
Shutdown Current into VBATT, ISDB
Efficiency, RLIM = 4.0K
MIN
0.7
3.16
Efficiency, RLIM = 1.87K
Inductor Current Limit, IPK
1.0
Output Current
Minimum Off-Time Constant KOFF
Maximum On-Time Constant KON
NMOS Switch Resistance
PMOS Switch Resistance
FB Set Voltage, VFB
FB Input Current
LBI Falling Trip Voltage
LBI Hysteresis
Low Output Voltage for LBON, VOL
Leakage current for LBON
SHDN Input Voltage
SHDN Input Current
VIL
VIH
VIL
VIH
1.20
0.594
1.0
2.0
TYP
0.62
0.85
3.30
12
20
1
200
85
91
85
92
1.2
250
700
150
400
1.1
3.3
0.30
0.30
1.25
1
0.625
25
1
MAX
4.5
0.9
3.44
22
500
500
500
1.4
0.6
0.6
1.30
100
0.656
0.4
500
0.25
0.5
100
UNITS
V
V
V
V
µA
nA
nA
nA
%
%
%
%
A
mA
mA
mA
mA
V*µs
V*µs
V
nA
V
mV
V
nA
V
nA
CONDITIONS
After Startup
RLOAD = 3k
3.3V VO preset
VOUT = 3.3V, VFB = 1.5V, Toggle SHDN
VOUT = 3.3V, VFB = 1.5V
VSHDN = 0V
VSHDN = 0V, VBATT = 2.6V
VBATT = 1.3V, IOUT = 50mA
VBATT = 2.6V, IOUT = 100mA
VBATT = 1.3V, IOUT = 100mA
VBATT = 2.6V, IOUT = 200mA
RLIM = 1.17k , I PK = 1400/RLIM
VBATT = 1.3V, RLIM = 1.17k
VBATT = 2.6V, RLIM = 1.17k
VBATT = 1.3V, RLIM = 1.87k
VBATT = 2.6V, RLIM = 1.87k
tOFF K OFF / (VOUT- VBATT)
tON K ON / VBATT
INMOS = 100mA
IPMOS = 100mA
External feedback
VFB =1.3V
VBATT = 1.3V, Isink = 1mA
VBATT = 1.3V, VLBON = 3.3V
VBATT = 1.3V
VBATT = 1.3V
VBATT = 2.6V
VBATT = 2.6V
Rev:001 Date:11/20/03 SP6649 Ultra-low Quiescent Current, High Efficiency Boost DC-DC Regulator
2
© Copyright 2002 Sipex Corporation


Part Number SP6649
Description Ultra-low Quiescent Current / High Efficiency Boost DC-DC Regulator
Maker Sipex
Total Page 9 Pages
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