1
CAT3200, CAT3200-5
Low Noise Regulated Charge Pump DC-DC Converter
DESCRIPTION
The CAT3200 and CAT3200-5 are switched capacitor
boost converters that deliver a low noise, regulated
output voltage. The CAT3200-5 gives a fixed regulated
5V output. The CAT3200 has an adjustable output
using external resistors. The constant frequency 2MHz
charge pump allows small 1
F 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.
FEATURES
s
Constant high frequency (2MHz) operation
s
100mA output current
s
Regulated output voltage (5V fixed CAT3200-5,
Adjustable CAT3200)
s
Low quiescent current (1.7mA typ.)
s
Input voltage operation down to 2.7V
s
Soft start, slew rate control
s
Thermal overload shutdown protection
s
Low value external capacitors (1
F)
s
Foldback current overload protection
s
Shutdown current less than 1
A
s
CAT3200-5 in low profile (1mm thin) 6-lead
SOT23 package
s
CAT3200 in MSOP-8 package
2004 by Catalyst Semiconductor, Inc.
Doc. No. 5002, Rev. E
APPLICATIONS
s
3V to 5V boost conversion
s
White LED driver
s
USB On-The-Go 5V supply
A shutdown control input allows the device to be
placed in power-down mode, reducing the supply
current to less than 1
A.
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 CAT3200-5 is available in a 6-lead, 1mm max
thin SOT23 package. The CAT3200 is available in an
8-lead MSOP package.
s
Local 5V supply from lower rail
s
Battery backup systems
s
Handheld portable devices
TYPICAL APPLICATION
CAT3200-5
CNEG
CPOS
IN
OUT
ON OFF
SHDN
GND
+
-
5V Output
3.3V
CAT3200
CNEG
CPOS
IN
OUT
ON OFF
SHDN
GND
+
-
3.3V
VIN
5V
100mA
VOUT
Adjustable Output
VIN
FB
R1
R2
100mA
VOUT
VOUT = 1.27 V 1+
(
(
R1
R2
HA
LOGEN FREE
TM
LEAD FREE
CAT3200/3200-5
2
Doc. No. 5002, Rev. E
PIN CONFIGURATION
ORDERING INFORMATION
6-lead Thin SOT23
CAT3200-5
1
2
3
6
5
4
OUT
GND
SHDN
CPOS
IN
CNEG
8-pin MSOP
1
2
3
4
8
7
6
5
CPOS
IN
CNEG
PGND
OUT
FB
SHDN
SGND
CAT3200
PIN DESCRIPTIONS
Designation
Description
OUT
Regulated output voltage.
GND
Ground reference for all voltages.
SHDN
Shutdown control logic input (Active LOW)
CNEG
Negative connection for the flying capacitor.
IN
Input power supply.
CPOS
Positive connection for the flying capacitor.
FB
Feedback to set the output voltage.
PGND
Power ground.
SGND
Signal ground.
r
e
b
m
u
N
t
r
a
P
e
g
a
t
l
o
V
t
u
p
t
u
O
e
g
a
k
c
a
P
g
n
i
k
r
a
M
e
g
a
k
c
a
P
y
t
i
t
n
a
u
Q
l
e
e
R
r
e
p
7
E
T
-
5
-
6
S
E
0
0
2
3
T
A
C
V
5
3
2
T
O
S
n
i
h
t
d
a
e
l
-
6
J
B
0
0
0
,
3
3
1
E
T
-
5
-
6
S
E
0
0
2
3
T
A
C
V
5
3
2
T
O
S
n
i
h
t
d
a
e
l
-
6
J
B
0
0
0
,
0
1
3
1
E
T
-
8
S
M
E
0
0
2
3
T
A
C
e
l
b
a
t
s
u
j
d
A
P
O
S
M
d
a
e
l
-
8
R
T
A
A
0
0
5
,
2
7
E
T
-
I
D
T
0
0
2
3
T
A
C
V
5
e
e
r
F
d
a
e
L
,
3
2
T
O
S
n
i
h
t
d
a
e
l
-
6
N
L
0
0
0
,
3
3
1
E
T
-
I
D
T
0
0
2
3
T
A
C
V
5
e
e
r
F
d
a
e
L
,
3
2
T
O
S
n
i
h
t
d
a
e
l
-
6
N
L
0
0
0
,
0
1
3
1
E
T
-
I
Z
0
0
2
3
T
A
C
e
l
b
a
t
s
u
j
d
A
e
e
r
F
d
a
e
L
,
P
O
S
M
d
a
e
l
-
8
A
D
B
A
0
0
5
,
2
CAT3200/3200-5
3
Doc. No. 5002, Rev. E
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.
ELECTRICAL SPECIFICATIONS
Recommended operating conditions unless otherwise specified. C
IN
, C
OUT
, C
FLY
are 1
F ceramic capacitors and V
IN
is set to 3.6V.
ABSOLUTE MAXIMUM RATINGS
V
IN
, V
OUT
,
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
RECOMMENDED OPERATING CONDITIONS
V
IN ...................................................................................
2.7V to 4.5V
C
IN
, C
OUT
, C
FLY ..........................................................................
1
F
I
LOAD .................................................................................
0 to 100mA
Ambient Temperature Range ................... -40
C to 85
C
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
OUT
Regulated Output
I
LOAD
40mA, V
IN
2.7 V
4.8
5.0
5.2
V
I
LOAD
100mA, V
IN
3.1 V
V
LINE
Line Regulation
3.1V
V
IN
4.5V, I
LOAD
= 50mA
6
mV
V
LOAD
Load Regulation
I
LOAD
= 10mA to 100mA, V
IN
= 3.6V
20
mV
F
OSC
Switching Frequency
1.3
2.0
2.6
MHz
V
R
Output Ripple
I
LOAD
= 100mA
30
mVp-p
Voltage
CAT3200-5 Only
Efficiency
I
LOAD
= 50mA, V
IN
= 3V, CAT3200-5
80
%
I
GND
Ground Current
I
LOAD
= 0mA,
SHDN
= V
IN
1.6
4
mA
I
SHDN
Shutdown Input
I
LOAD
= 0mA,
SHDN
= 0V to V
IN
1
A
Current
V
FB
FB Voltage
CAT3200 Only
1.22
1.27
1.32
V
I
FB
FB Input Current
CAT3200 Only
-50
50
nA
R
OL
Open-Loop
I
LOAD
= 100mA, V
IN
= 3V (Note 1)
10
Resistance
T
ON
V
OUT
Turn-on time
I
LOAD
= 0mA, V
IN
= 3V
0.5
ms
(10% to 90%)
V
IHSHDN
High Detect
0.8
1.3
V
Shutdown Threshold
V
ILSHDN
Low Detect
0.4
V
Shutdown Threshold
I
ROUT
Reverse Leakage
V
OUT
= 5V, Shutdown mode (Note 2)
15
30
A
into OUT pin
I
SC
Short-circuit Output
V
OUT
= 0V
80
mA
T
SD
Thermal Shutdown
160
C
T
HYST
Thermal Hysteresis
20
C
CAT3200/3200-5
4
Doc. No. 5002, Rev. E
TYPICAL PERFORMANCE CHARACTERISTICS (CAT3200-5)
Shutdown Input Threshold vs. Supply Voltage
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
2.7
3.0
3.3
3.6
3.9
4.2
4.5
INPUT VOLTAGE [V]
SH
U
T
D
O
W
N
T
H
R
E
S
H
O
L
D
[V
]
.
Ground Current vs. Supply Voltage (No Load)
1.2
1.4
1.6
1.8
2.0
2.2
2.7
3.0
3.3
3.6
3.9
4.2
4.5
INPUT VOLTAGE [V]
G
R
O
U
N
D
C
U
R
R
E
N
T
[
mA
]
Line Regulation
4.8
4.9
5.0
5.1
5.2
2.7
3.0
3.3
3.6
3.9
4.2
4.5
INPUT VOLTAGE [V]
O
U
TP
U
T
V
O
L
TA
G
E
[
V
]
.
20mA Load
100mA Load
Load Regulation
4.8
4.9
5.0
5.1
5.2
0
50
100
150
LOAD CURRENT [mA]
O
U
T
P
U
T
V
O
L
T
A
G
E
[
V
]
.
VIN = 2.7V
VIN = 3V
VIN = 3.2V
Oscillator Frequency vs. Supply Voltage
1.6
1.8
2.0
2.2
2.4
2.6
2.7
3.0
3.3
3.6
3.9
4.2
4.5
INPUT VOLTAGE [V]
OS
C
I
L
L
A
T
OR
F
R
E
Q
U
E
N
C
Y
[M
H
z
]
Efficiency vs. Load Current
30
40
50
60
70
80
90
100
1
10
100
LOAD CURRENT [mA]
VIN= 2.7V
VIN= 3.7V
VIN= 4.5V
VIN= 3.2V
EFFICIENCY
[%]
T
AMB
=25
C, C
IN
=C
OUT
=C
FLY
=1
F, V
IN
=3.3V unless specified otherwise.
CAT3200/3200-5
5
Doc. No. 5002, Rev. E
TYPICAL PERFORMANCE CHARACTERISTICS (CAT3200-5)
T
AMB
=25
C, C
IN
=C
OUT
=C
FLY
=1
F, V
IN
=3.3V unless specified otherwise.
Soft Start Power Up (90mA Load, 3.3V Input)
Load Step Response (3.3V Input)
Output Ripple (100mA Load, 3.3V Input)
Short Circuit Current vs Supply Voltage
0
50
100
150
200
250
2.7
3.0
3.3
3.6
3.9
4.2
4.5
INPUT VOLTAGE [V]
CURRE
NT
L
I
M
I
T
[
mA
]
.
Output Voltage Change vs. Temperature
-2
-1
0
1
2
-40
-20
0
20
40
60
80
100
TEMPERATURE [ C]
OU
T
P
U
T V
OL
TA
GE
C
H
A
N
G
E
[%
]
.
10mA Load
Oscillator Frequency Change vs. Temperature
-4
-2
0
2
4
-40
-20
0
20
40
60
80
100
TEMPERATURE [ C]
F
R
E
Q
U
E
NCY
CHA
NG
E
[
%
]
.
PDF 
ZIP