gm34063 Gamma Microelectronics, gm34063 Datasheet - Page 10

• Manufacturer Part Number: gm34063
• Description: Gm34063 1.5a Dc-to-dc Converter Control Circuit
• Manufacturer: Gamma Microelectronics

10
Figure 9. External Current Boost Connections for I Peak Greater than 1.5A
Voltage Inverting Converter
4.5V to 6.0V
Line Regulation
Load Regulation
Output Ripple
Short Circuit Current
Efficiency
Output Ripple With Optional Fitter
V
MICROELECTRONICS
IN
A
R
0.24
+
100
8.2k
SC
Test
8
5
R2
7
6
A
R1
953
V
CC
Osc.
I
pk
+
-
Comp.
C
T
S
R
Reference
Regulator
Q
V
V
1.25V
IN
IN
100
= 5.0 V,
= 4.5 V to 6.0 V, I = 100 mA
V
V
V
Q2
V
IN
IN
IN
IN
1.5A DC-to-DC CONVERTER CONTROL CIRCUIT
= 5.0 V,
= 5.0 V,
= 5.0 V,
Conditions
= 5.0 V, R = 0.1W
I
O
Q1
= 10mA to 100 mA
I
I
I
O
O
O
1
3
4
2
1000±F
Power Management
L
= 100 mA
= 100 mA
=100 mA
88µH
L
+
1500
O
pF
C
+
C
1N5819
O
-12 V / 100 mA
V
OUT
0.022mV = ± 0.09%
3.0 mV = ± 0.012%
Results
500 mVpp
GM34063
70 mVpp
1.0 µH
Optional
910mA
62.2%
Filter
100
+
V
OUT