Preliminary Datasheet
SGM6601
Low-Power DC-DC Step-Up Converter
GENERAL DESCRIPTION
The SGM6601 is a high-frequency boost converter
dedicated for small to medium LCD bias supply and white
LED backlight supplies. The device is ideal to generate
output voltages up to 38V from a dual cell NiMH/NiCd or
a single cell Li-Ion battery. The part can also be used to
generate standard 3.3V/5V to 12V power conversions.
The SGM6601 operates with a switching frequency up to
1MHz. This allows the use of small external components
using ceramic as well as tantalum output capacitors.
Together with the small package, the SGM6601 gives a
very small overall solution size. The SGM6601 has an
internal 400mA switch current limit, offering lower output
voltage ripple and allows the use of a smaller form factor
inductor for lower power applications. The low quiescent
current (20µA TYP) together with an optimized control
scheme, allows device operation at very high efficiencies
over the entire load current range.
The SGM6601 is available in TDFN-2×2-6L and
TSOT-23-5 packages. It operated over an ambient
temperature range of -40℃ to +85℃.
FEATURES
Input Voltage Range: 1.8V to 6V
Adjustable Output Voltage Range up to 38V
400mA Internal Switch Current
Up to 1MHz Switching Frequency
20µA Typical No-Load Quiescent Current
0.1µA Typical Shutdown Current
Internal Soft Start
-40℃ to +85℃ Operating Temperature Range
Available in Green TSOT-23-5 and TDFN-2×2-6L
Packages
APPLICATIONS
LCD Bias Supply
White-LED Supply for LCD Backlights
Digital Still Camera
PDAs, Organizers, and Handheld PCs
Cellular Phones
Internet Audio Player
Standard 3.3V/5V to 12V Conversion
TYPICAL APPLICATION
L1
10µH
V
IN
1.8V to 6V
VIN
C
IN
4.7µF
10kΩ
EN
GND
SW
D1
V
OUT
V
IN
to 38V
R1
C
FF
C
OUT
1µF
SGM6601
FB
R2
SG Micro Corporation
www.sg-micro.com
April 26, 2012
SGM6601
Low-Power DC-DC Step-Up Converter
PACKAGE/ORDERING INFORMATION
MODEL
PIN-
PACKAGE
TDFN-2×2-6L
TSOT-23-5
SPECIFIED
TEMPERATURE
RANGE
-40℃ to +85℃
-40℃ to +85℃
ORDERING
NUMBER
SGM6601YTDI6G/TR
SGM6601YTN5G/TR
PACKAGE
MARKING
6601
SG4XX
PACKAGE
OPTION
Tape and Reel, 3000
Tape and Reel, 3000
SGM6601
ABSOLUTE MAXIMUM RATINGS
Input Supply Voltage................................................ -0.3V to 6V
EN and FB Pin Voltages.......................................... -0.3V to V
IN
SW Switch Voltage............................................................... 40V
Operating Temperature Range............................-40℃ to +85℃
Junction Temperature........................................................150℃
Storage Temperature.........................................-65℃ to +150℃
Package Thermal Resistance
TDFN-2×2-6L,
θ
JA
……………….…….…………….…….124℃/W
TSOT-23-5,
θ
JA
……………….…………………...……....250℃/W
Lead Temperature (soldering, 10s) ...................................260℃
ESD Susceptibility
HBM..................................................................................4000V
MM..................................................................................... 200V
NOTE:
Stresses beyond those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device. These
are stress ratings only, and functional operation of the device at
these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied.
Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
CAUTION
This integrated circuit can be damaged by ESD if you don’t pay
attention to ESD protection. SGMICRO recommends that all
integrated circuits be handled with appropriate precautions.
Failure to observe proper handling and installation procedures
can cause damage. ESD damage can range from subtle
performance degradation to complete device failure. Precision
integrated circuits may be more susceptible to damage because
very small parametric changes could cause the device not to
meet its published specifications.
SGMICRO reserves the right to make any change in circuit
design, specification or other related things if necessary without
notice at any time. Please contact SGMICRO sales office to get
the latest datasheet.
SG Micro Corporation
www.sg-micro.com
2
SGM6601
Low-Power DC-DC Step-Up Converter
PIN CONFIGURATIONS
(TOP VIEW)
SW
GND
VIN
EN
1
6
SW
NC
FB
GND
2
1
5
VIN
SG4XX
GND
TDFN-2×2-6L
2
3
5
4
FB
3
4
EN
TSOT-23-5
PIN DESCRIPTIONS
NAME
SW
GND
FB
EN
VIN
NC
Exposed
Pad
PIN
TDFN-2×2-6L
6
1
4
3
2
5
GND
TSOT-23-5
1
2
3
4
5
—
—
FUNCTION
Switch Pin. It is connected to the drain of the internal power MOSFET.
Connect this pin to the inductor and Schottky diode.
Ground.
Feedback Pin. Connect this pin to the external voltage divider to
program the desired output voltage.
Enable Pin. Pulling this pin to ground forces the device into shutdown
mode reducing the supply current to less than 1µA. This pin should not
be left floating and needs to be terminated.
Power Input Supply. Must be closely decoupled to GND with a
capacitor.
No Connection.
Power Ground Exposed Pad. Must be connected to GND plane.
SG Micro Corporation
www.sg-micro.com
3
SGM6601
Low-Power DC-DC Step-Up Converter
ELECTRICAL CHARACTERISTICS
(V
IN
= 2.4V, EN = V
IN
, C
IN
= 4.7µF, C
OUT
= 1µF, L = 10µH, T
A
= -40℃
to
+85℃. Typical values are at T
A
= +25℃, unless otherwise
noted.)
PARAMETER
SUPPLY CURRENT
Input Voltage Range
Shutdown Current
Operating Quiescent Current
Under Voltage Lockout Threshold
ENABLE
EN Input High Voltage
EN Input Low Voltage
EN Input Leakage Current
POWER SWITCH AND CURRENT LIMIT
Maximum switch voltage
Minimum Off Time
Maximum On Time
MOSFET On-Resistance
MOSFET Leakage Current
Switch Current Limit
OUTPUT
Adjustable Output Voltage Range
Feedback Reference Voltage
Feedback Leakage Current
Output Voltage Line Regulation
Output Voltage Load Regulation
V
OUT
V
FB
I
FB
∆V
OUT
V
FB
= 1.3V
V
IN
= 1.8V to 6V, V
OUT
= 18V, I
LOAD
=10mA,
C
FF
= not Connected
V
IN
= 2.4V, V
OUT
= 18V, I
OUT
= 0mA to 30mA
0.04
0.15
V
IN
1.227
1
38
V
V
µA
%/V
%/mA
I
LIM
V
SW
t
OFF
t
ON
R
DS(ON)
V
IN
= 2.4V, I
SW
= 200mA
V
SW
= 38V
400
430
6
660
1
40
V
ns
µs
mΩ
µA
mA
V
IH
V
IL
EN = GND or V
IN
0.1
1.3
0.4
1
V
V
µA
V
IN
I
SD
I
Q
V
UVLO
EN = GND
I
OUT
= 0mA, not switching, V
FB
= 1.3V
1.8
0.1
20
1.5
6
1
V
µA
µA
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SG Micro Corporation
www.sg-micro.com
4
SGM6601
Low-Power DC-DC Step-Up Converter
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs. Output Current
100
Efficiency vs. Load Current
100
90
Efficiency (%)
Efficiency (%)
V
IN
= 5V
V
IN
= 3.6V
V
IN
= 2.4V
V
OUT
= 18V
L = 10µH
0.1
1
10
Output Current (mA)
100
90
L = 10μH
80
L = 3.3µH
80
70
70
V
OUT
= 18V
60
0.1
1
10
Load Current (mA)
100
60
Efficiency vs. Input Voltage
100
90
Efficiency (%)
80
70
60
50
1.8
2.4
3
3.6
4.2
4.8
5.4
6
Input Voltage (V)
I
OUT
= 5mA
Quiescent Current vs. Input Voltage
30
Quiescent Current (µA)
I
OUT
= 10mA
25
20
V
OUT
= 18V
L = 10µH
15
T
A
= 27℃
No Switching
1.8
2.4
3
3.6
4.2
4.8
5.4
6
10
Input Voltage (V)
R
DS(ON)
vs. Temperature
1000
900
800
R
DS(ON)
(mΩ)
700
600
500
400
300
200
-50
-25
0
25
50
75
100
Temperature (℃)
SG Micro Corporation
www.sg-micro.com
5
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