
4-44
TELCOM SEMICONDUCTOR, INC.
Package Power Dissipation (T
A
≤
70
°
C) (Note 2)
8-Pin CerDIP ..................................................800mW
8-Pin Plastic DIP.............................................730mW
8-Pin SOIC .....................................................470mW
Operating Temperature Range
C Suffix ..................................................0
°
C to +70
°
C
I Suffix...............................................– 25
°
C to +85
°
C
E Suffix .............................................– 40
°
C to +85
°
C
M Suffix...........................................– 55
°
C to +125
°
C
Storage Temperature Range ................– 65
°
C to +150
°
C
ELECTRICAL CHARACTERISTICS:
T
A
= +25
°
C, V
+
= 5V, C
OSC
= 0, Test Circuit (Figure 1), unless otherwise
indicated.
Symbol
Parameter
Test Conditions
I
+
Supply Current
R
L
=
∞
0
°
C < T
A
< +70
°
C
– 40
°
C < T
A
< +85
°
C
– 55
°
C < T
A
< +125
°
C
I
+
Supply Current
0
°
C < T
A
< +70
°
C
(Boost Pin = V
+
)
– 40
°
C < T
A
< +85
°
C
– 55
°
C < T
A
< +125
°
C
V
+
Supply Voltage Range, High
Min
≤
T
A
≤
Max,
R
L
= 10 k
, LV Open
V
+
Supply Voltage Range, Low
Min
≤
T
A
≤
Max,
R
L
= 10 k
, LV to GND
R
OUT
Output Source Resistance
I
OUT
= 20mA
I
OUT
= 20mA, 0
°
C
≤
T
A
≤
+70
°
C
I
OUT
= 20mA, –40
°
C
≤
T
A
≤
+85
°
C
I
OUT
= 20mA, –55
°
C
≤
T
A
≤
+125
°
C
V
+
= 2V, I
OUT
= 3 mA, LV to GND
0
°
C
≤
T
A
≤
+70
°
C
– 55
°
C
≤
T
A
≤
+125
°
C
F
OSC
Oscillator Frequency
Pin 7 open; Pin 1 open or GND
Boost Pin = V
+
P
EFF
Power Efficiency
R
L
= 5 k
; Boost Pin Open
T
MIN
< T
A
< T
MAX
; Boost Pin Open
Boost Pin = V
+
V
OUT
E
FF
Voltage Conversion Efficiency
Z
OSC
Oscillator Impedance
V
+
= 2V
V
+
= 5V
NOTES:
1. Connecting any input terminal to voltages greater than V
+
or less than GND may cause destructive latch-up. It is recommended that no
inputs from sources operating from external supplies be applied prior to "power up" of the TC1044S.
2. Derate linearly above 50
°
C by 5.5mW/
°
C.
Min
Typ
Max
Unit
—
—
—
—
—
—
—
3
80
—
—
—
—
—
—
—
160
180
180
200
300
350
400
12
μ
A
μ
A
V
1.5
—
3.5
V
—
—
—
—
60
70
70
105
100
120
120
150
—
—
—
—
96
95
—
99
—
—
—
—
10
45
98
97
88
99.9
1
100
250
400
—
—
—
—
—
—
—
—
kHz
%
R
L
=
∞
%
M
k
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage ......................................................... +13V
LV, Boost and OSC Inputs
Voltage (Note 1) .........................– 0.3V to (V
+
+ 0.3V)
for V
+
< 5.5V
(V
+
– 5.5V) to (V
+
+ 0.3V)
for V
+
> 5.5V
Current Into LV (Note 1)......................20
μ
A for V
+
> 3.5V
Output Short Duration (V
SUPPLY
≤
5.5V) .........Continuous
Lead Temperature (Soldering, 10 sec) .................+300
°
C
*Static-sensitive device. Unused devices must be stored in conductive material. Protect devices from static discharge and static fields. Stresses above 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 above those indicated in the operation sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
TC1044S
CHARGE PUMP DC-TO-DC
VOLTAGE CONVERTER