Skyworks Solutions, Inc. [978] 241-7000
Fax [978] 241-7906
Email sales@skyworksinc.com
www.skyworksinc.com
1
Specifications subject to change without notice. 3/99A
AM100-73
Preliminary
DC/DC Converter
Features
Converts a Positive Voltage Into a Negative
Voltage
Ideal for Providing Gate Voltage Bias for
GaAs Products
Ultra Small SOT-6 Package
Only Three Capacitors Required as
Additional Components
High Oscillating Frequency (600 kHz)
Enables the Use of Low Cost Ceramic
Components
Available with Some of Alpha's Power
Products in a Single Package*
Description
The AM100-73 is a low cost, switched capacitor voltage
converter. Its no-load, inverted output voltage follows the
input voltage over a 2-7 V range. The high operating
frequency of the AM100-73 permits the use low cost
ceramic capacitors and facilitates filtering. Applications
include portable and mobile voltage conversion, GaAs
amplifier biasing, automatic power control and LCD
negative supply.
Parameter
Value
Unit
Supply Voltage
10
V
Output Short Circuit Duration
10
Sec.
Operating Temperature
-40 to +100
C
Storage Temperature
-65 to +150
C
Absolute Maximum Ratings
Operating Characteristics at 25C
Parameter
1
Symbol
Condition
Min.
Typ.
Max.
Unit
Supply Voltage
V
GEN
2
7
V
Supply Current
I
GEN
V
GEN
= 3.5 V
I
LOAD
= 3.5 mA
-3.15
A
Output Voltage
V
SS
V
GEN
= 3.5 V
I
LOAD
= 3.5 mA
-3.15
V
Oscillation Frequency
F
OSC
600
kHz
Output Impedance
R
o
70
Current Efficiency
80
%
Voltage Conversion Efficiency
V
GEN
= 3.5 V
I
LOAD
= 0.0 mA
95
%
SOT-6
0.074
(1.90 mm REF.)
0.071 (1.80 mm)
0.052 (1.30 mm)
0.037 (0.95 mm) REF.
0.122 (3.10 mm)
0.106 (2.70 mm)
0.006
(0.15 mm)
0.000
(0.00 mm)
0.057 (1.45 mm)
0.035 (0.90 mm)
0.020 (0.51 mm)
0.014 (0.350 mm)
0.126 (3.20 mm)
0.087 (2.20 mm)
PIN 6
PIN 1
PIN 1
INDICATOR
0.022 (0.61 mm)
0.004 (0.10 mm)
0.014
(0.26 mm)
0.004
(0.10 mm)
0.012
(0.30 mm)
TYP.
5.0 1
5.0 1
1. All measurements made in a 50
system, unless otherwise specified.
DC/DC Converter
AM100-73
2
Skyworks Solutions, Inc. [978] 241-7000
Fax [978] 241-7906
Email sales@skyworksinc.com
www.skyworksinc.com
Specifications subject to change without notice. 3/99A
Output Voltage vs. Load Current
V
= 5 V
GEN
V(
V
)
SS
7
6
5
4
3
2
1
0
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
Load Current (A)
V
(V)
GEN
I(
A
)
GEN
Supply Current vs. Supply Voltage
I
= 0 mA
SS
0
0.0005
0.001
0.0015
0.002
0.0025
0.003
0
1
2
3
4
5
6
7
8
V
(V)
SS
OutputVoltage vs. Load Current
V
= 2 V to 7 V
GEN
-7
-6
-5
-4
-3
-2
-1
0
0
0.005
0.015
0.025
0.035
Load Current (mA)
V
= 2 V
GEN
V
= 7 V
GEN
V(
V
)
SS
Output Voltage vs. Supply Voltage
I
= 0 mA
SS
2
1.75
1.5
1.25
1
0.75
0.5
0.25
0
0.25
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
V
(V)
GEN
Output Voltage vs. Load Current
V
= 2 V
GEN
2
1.6
1.2
0.8
0.4
0
0
0.005 0.01 0.015 0.02 0.025 0.03 0.035
Load Current (A)
V(
V
)
SS OUT
Output Voltage vs. Supply Voltage
I
= 0 mA and 7 mA
SS
7
6
5
4
3
2
1
0
1
0
1
2
3
4
5
6
7
V(
V
)
SS
V
(V)
GEN
I
= 0 mA
SS
I
= 7 mA
SS
Typical Performance Data at 25C
DC/DC Converter
AM100-73
Skyworks Solutions, Inc. [978] 241-7000
Fax [978] 241-7906
Email sales@skyworksinc.com
www.skyworksinc.com
3
Specifications subject to change without notice. 3/99A
Pin Out
Pin Configuration
12
3
65
4
V
GEN
GND
GND
V
OUT
C
B
C
A
Terminal
Symbol
Description
1
V
GEN
Positive Input Voltage
2
GND
Ground
3
GND
Ground
4
C
A
Charge Pump Capacitor P
IN
A
5
C
B
Charge Pump Capacitor P
IN
B
6
V
OUT
Negative Output Voltage
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