gm34063 Gamma Microelectronics, gm34063 Datasheet - Page 6

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

6
Figure 7. External Current Boost Connections for I Peak Greater than 1.5A
Step - Up Converter
12 V
V
Load Regulation
Output Ripple
Efficiency
Output Ripple With Optional Fitter
Line Regulation
IN
MICROELECTRONICS
A
+
100
R
0.22
2.2k
SC
180
R1
8
7
6
5
Test
R2
47k
V
CC
A
Osc.
I
pk
+
- Comp.
C
T
S
R
Reference
170 µH
Regulator
Q
1.25V
L
100
Q2
V
V
IN
IN
= 12 V, I = 75mA to 175 mA
= 8.0 V to 16 V, I = 175 mA
V
V
V
IN
IN
IN
Q1
1.5A DC-to-DC CONVERTER CONTROL CIRCUIT
Conditions
= 12 V, I = 175 mA
= 12 V, I = 175 mA
= 12 V, I =175 mA
4
2
3
1500pF
1
O
330
C
O
O
O
T
Power Management
O
+
C
1N5819
O
28 V / 175 mA
C
V
OUT
Optional
1.0 µH
Filter
10mV = ± 0.017%
30 mV = ± 0.05%
Results
400 mVpp
GM34063
40 mVpp
87.7%
+
100
V
OUT