Advance Information
CAT3200, CAT3200-5
Low Noise Regulated Charge Pump DC-DC Converter
FEATURES
s
Constant high frequency (2MHz) operation
s
100mA output current
s
Regulated output voltage (5V fixed CAT3200-5,
s
Thermal overload shutdown protection
s
Low value external capacitors (1µF)
s
Foldback current overload protection
s
Shutdown current less than 1µA
s
CAT3200-5 in low profile (1mm thin) 6-lead
Adjustable CAT3200)
s
Low quiescent current (1.7mA typ.)
s
Input voltage operation down to 2.7V
s
Soft start, slew rate control
SOT23 package
s
CAT3200 in MSOP-8 and in low profile (0.8mm
thin) TDFN packages
APPLICATIONS
s
3V to 5V boost conversion
s
White LED driver
s
USB On-The-Go 5V supply
s
Local 5V supply from lower rail
s
Battery backup systems
s
Handheld portable devices
DESCRIPTION
The CAT3200 and CAT3200-5 are DC/DC boost
converters that deliver a low noise, fully regulated
output voltage. The CAT3200-5 gives a fixed regulated
5V output. The CAT3200 has an adjustable output
using an external resistor. The constant frequency
2MHz charge pump allows small 1µF ceramic
capacitors to be used.
Maximum output loads of up to 100mA can be
supported over a wide range of input supply voltages
(2.7V to 4.5V) making the device ideal for battery-
powered applications.
A shutdown control input allows the device to be
placed in power-down mode, reducing the supply
current to less than 1µA.
In the event of short circuit or overload conditions, the
device is fully protected by both foldback current
limiting and thermal overload detection. In addition, a
soft start, slew rate control circuit limits inrush current
during power-up.
The CAT3200 is available in an 8-lead MSOP package
and an 8-pad 0.8mm thin TDFN package. The
CAT3200-5 is available in a 6-lead, 1mm max thin
SOT23 package.
TYPICAL APPLICATION
5V Output
Adjustable Output
CNEG
VIN
IN
CPOS
OUT
5V
VOUT
100mA
VIN
IN
CNEG
CPOS
OUT
VOUT
100mA
R2
FB
GND
R1
CAT3200-5
+
3.3V
-
ON OFF
SHDN
GND
CAT3200
+
3.3V
-
ON OFF
SHDN
R
VOUT = 1.26 1+ 2
R1
(
© 2004 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
1
(
Doc. No. 5002, Rev. N
VOUT = 5V
IOUT ≤ 50mA, for VIN ≥ 2.8V
IOUT ≤ 90mA, for VIN ≥ 3V
CAT3200/3200-5
ABSOLUTE MAXIMUM RATINGS
V
IN
,
SHDN,
C
NEG
, C
POS
Voltage ........... -0.6V to 6.0V
V
OUT
Short Circuit Duration ......................... Indefinite
Output Current ................................................ 200mA
ESD Protection (HBM) ..................................... 2000V
Junction Temperature ...................................... 150°C
Storage Temperature Range ............. -65°C to 160°C
Lead Soldering Temperature (10 sec) ............. 300°C
Power Dissipation (SOT23-6) ............................ 0.3W
Power Dissipation (8-MSOP) ............................. 0.5W
Power Dissipation (8-TDFN) .............................. 1.0W
RECOMMENDED OPERATING CONDITIONS
V
IN ...................................................................................
2.7V to 4.5V
C
IN
, C
OUT
, C
FLY
..........................................................................
1µF
I
LOAD .................................................................................
0 to 100mA
Ambient Temperature Range ................... -40°C to 85°C
ELECTRICAL SPECIFICATIONS
Recommended operating conditions unless otherwise specified. C
IN
, C
OUT
, C
FLY
are 1µF ceramic capacitors and V
IN
is set to 3.6V.
Symbol
V
IN
V
OUT
V
LINE
V
LOAD
F
OSC
V
R
η
I
GND
I
SHDN
V
FB
I
FB
R
OL
T
ON
V
IHSHDN
V
ILSHDN
I
ROUT
I
SC
T
SD
T
HYST
Parameter
Input Voltage
Regulated Output
Line Regulation
Load Regulation
Switching Frequency
Output Ripple
Voltage
Efficiency
Ground Current
Shutdown Input
Current
FB Voltage
FB Input Current
Open-Loop
Resistance
V
OUT
Turn-on time
(10% to 90%)
High Detect
Shutdown Threshold
Low Detect High
Detect Threshold
Reverse Leakage
into OUT pin
Short-circuit Output
Thermal Shutdown
Thermal Hysteresis
V
OUT
= 5V, Shutdown mode (Note 2)
V
IN
= 3V, V
OUT
= 0V
15
120
160
20
I
LOAD
= 0mA, V
IN
= 3V
1.3
0.8
0.8
0.4
30
ms
V
V
µA
mA
°
C
°
C
I
LOAD
= 100mA, V
IN
= 3V
CAT3200-5 Only
I
LOAD
= 50mA, V
IN
= 3V, CAT3200-5
I
LOAD
= 0mA,
SHDN
= V
IN
I
LOAD
= 0mA,
SHDN
= 0V to V
IN
CAT3200 Only
CAT3200 Only
I
LOAD
= 100mA, V
IN
= 3V (Note 1)
-1
1.217
-50
10
1.268
I
LOAD
≤
40mA, 2.7V
≤
V
IN
≤
4.5V
I
LOAD
≤
100mA, 3.1V
≤
V
IN
≤
4.5V
3.1V
≤
V
IN
≤
4.5V, I
LOAD
= 50mA
I
LOAD
= 10mA to 100mA, V
IN
= 3.6V
1.0
Conditions
Min
2.7
4.8
4.8
5.0
5.0
6
20
2.0
30
80
1.6
4
1
1.319
50
2.6
Typ
Max
4.5
5.2
5.2
Units
V
V
mV
mV
MHz
mVp-p
%
mA
µA
V
nA
Ω
Note 1: R
OL
= (2V
IN
- V
OUT
)/I
OUT
Note 2: In the event of a controlled shutdown, the output will be isolated from the input, but will remain connected to the internal resistor
feedback network. This will cause a small level of reverse current to flow back into the device to ground.
Doc. No. 5002, Rev. N
4
CAT3200/3200-5
TYPICAL PERFORMANCE CHARACTERISTICS (CAT3200-5)
T
AMB
=25°C, C
IN
=C
OUT
=C
FLY
=1µF, V
IN
=3.3V unless specified otherwise.
Shutdown Input Threshold vs. Supply Voltage
SHUTDOWN THRESHOLD [V] .
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
2.7
3.0
3.3
3.6
3.9
4.2
INPUT VOLTAGE [V]
4.5
Ground Current vs. Supply Voltage (No Load)
1.8
GROUND CURRENT [mA] .
1.6
1.4
1.2
1.0
0.8
2.7
3.0
3.3
3.6
3.9
INPUT VOLTAGE [V]
4.2
4.5
Line Regulation
5.2
Load Regulation
5.2
OUTPUT VOLTAGE [V] .
OUTPUT VOLTAGE [V] .
5.1
20mA Load
5.0
100mA Load
4.9
5.1
VIN = 3.2V
5.0
VIN = 3V
4.9
VIN = 2.7V
4.8
4.8
2.7
3.0
3.3
3.6
3.9
INPUT VOLTAGE [V]
4.2
4.5
0
50
100
LOAD CURRENT [mA]
150
Oscillator Frequency vs. Supply Voltage
2.0
Efficiency vs. Load Current
100
VIN= 2.7V
OSCILLATOR FREQUENCY [MHz]
1.8
1.6
1.4
1.2
1.0
2.7
3.0
3.3
3.6
3.9
INPUT VOLTAGE [V]
4.2
4.5
90
80
70
preliminary
VIN= 3.2V
VIN= 3.7V
EFFICIENCY [%]
60
50
40
30
1
10
LOAD CURRENT [mA]
100
VIN= 4.5V
5
Doc. No. 5002, Rev. N
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
