UNITRODE UCC19411, UCC19412, UCC19413, UCC29411, UCC29412 Technical data
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UCC19411
application
INFO
available
UCC19411/2/3
UCC29411/2/3
UCC39411/2/3
Low Power Synchronous Boost Converter
PRELIMINARY
FEATURES
•1V Input Voltage Operation Start-up Guaranteed under FULL Load on Main Output, and Operation Down to 0.5V
•200mW Output Power at Battery Voltages as low as 0.8V
•Secondary 7V Supply from a Single Inductor
•Output Fully Disconnected in Shutdown
•Adaptive Current Mode Control for Optimum Efficiency
•High Efficiency over Wide Operating Range
•6µA Shutdown Supply Current
•Output Reset Function with Programmable Reset Period
DESCRIPTION
The UCC39411 family of low input voltage, single inductor boost converters is optimized to operate from a single or dual alkaline cell, and steps up to a 3.3V, 5V, or adjustable output at 200mW. The UCC39411 family also provides an auxiliary 7V output, primarily for the gate drive supply, which can be used for applications requiring an auxiliary output, such as 5V, by linear regulating. The primary output will start up under full load at input voltages typically as low as 0.8V with a guaranteed max of 1V, and will operate down to 0.5V once the converter is operating, maximizing battery utilization.
The UCC39411 family is designed to accommodate demanding applications such as pagers and cell phones that require high efficiency over a wide operating range of several milli-watts to a couple of hundred milli-watts. High efficiency at low output current is achieved by optimizing switching and conduction losses with a low total quiescent current (50µA). At higher output current the 0.5Ω switch, and 1.2Ω synchronous rectifier along with continuous mode conduction provide high power efficiency. The wide input voltage range of the UCC39411 family can accommodate other power sources such as NiCd and NimH.
The 39411 family also provides shutdown control. Packages available are the 8 pin SOIC (D), 8 pin DIP (N or J), and 8 pin TSSOP (PW) to optimize board space.
SIMPIFIED BLOCK DIAGRAM AND APPLICATION CIRCUIT (UCC39412)
100µF |
22µH |
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SW |
1V TO 3.5V |
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1 |
6 |
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VIN |
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VGD |
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8 |
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1.2Ω VOUT |
3.3V 200mW |
100µF |
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7 |
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START-UP |
0.5Ω |
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100µF |
CIRCUITRY |
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MODULATOR CONTROL CIRCUIT |
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RRES |
SYNCHRONOUS RECTIFICATION CIRCUITRY |
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ANTI-CROSS CONDUCTION |
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START-UP |
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MULTIPLEXING LOGIC |
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MAX INPUT POWER CONTROL |
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ADAPTIVE CURRENT CONTROL |
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RESB |
RESET CONTROL CIRCUIT |
3 |
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SD/FB 2 |
GLITCH SUPRESSION |
CT |
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PROGRAMMABLE TIMING |
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4 |
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CT |
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GND |
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5 |
Note: Pinout shown is for the TSSOP Package. Consult Package Descriptions for DIP and SOIC configurations.
UDG-98067
SLUS245A - MARCH 1999
ABSOLUTE MAXIMUM RATINGS
VIN Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 10V
SD Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to VIN VGD Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 14V
SW Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 15V
Currents are positive into, negative out of the specific terminal. Consult Packaging Section of the Databook for thermal limitations and considerations of packages.
UCC19411/2/3
UCC29411/2/3
UCC39411/2/3
CONNECTION DIAGRAMS
DIL-8, SOIC-8 (TOP VIEW)
N or J Package, D Package
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VOUT |
1 |
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8 |
SW |
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VGD |
2 |
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7 |
GND |
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VIN |
3 |
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6 |
CT |
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SD/FB |
4 |
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5 |
RESB |
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TSSOP-8 (TOP VIEW)
PW Package
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VIN |
1 |
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8 |
VGD |
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SD/FB |
2 |
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7 |
VOUT |
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RESB |
3 |
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6 |
SW |
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CT |
4 |
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5 |
GND |
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ELECTRICAL CHARACTERISTICS: TJ= 0°C to +70°C for the UCC39411/2/3, TJ = –40°C to +85°C for the UCC29411/2/3, TJ = –55C to +125°C for the UCC19411/2/3, VIN = 1.25V for UCC39411/2, VIN = 2.5V for the UCC39413, TA=TJ.
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UCC39411 |
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UCC39412 |
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UCC19411/2/3 |
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UCC39413 |
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UCC29411/2/3 |
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PARAMETER |
TEST CONDITIONS |
MIN |
TYP |
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MAX |
MIN |
TYP |
MAX |
UNITS |
VIN Section |
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Minimum Start-up Voltage |
No External VGD Load, TJ=25°C, |
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0.8 |
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1 |
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.08 |
1 |
V |
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IOUT=60mA (Note 1) |
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No External VGD Load, IOUT=60mA |
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0.9 |
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1.1 |
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1.2 |
1.4 |
V |
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(Note 1) |
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Minimum Dropout Voltage |
No External VGD Load, IOUT=10mA |
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0.5 |
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0.7 |
V |
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(Note 1) |
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Input Voltage Range |
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1.1 |
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3.2 |
1.3 |
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3.2 |
V |
Quiescent Supply Current |
(Note 2) |
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6 |
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12 |
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8 |
16 |
A |
Supply Current at Shutdown |
SD = GND |
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6 |
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12 |
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8 |
16 |
A |
2
UCC19411/2/3
UCC29411/2/3
UCC39411/2/3
ELECTRICAL CHARACTERISTICS: TJ= 0°C to +70°C for the UCC39411/2/3, TJ = –40°C to +85°C for the UCC29411/2/3, TJ = –55C to +125°C for the UCC19411/2/3, VIN = 1.25V for UCC39411/2, VIN = 2.5V for the UCC39413, TA=TJ.
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UCC39411 |
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UCC39412 |
UCC19411/2/3 |
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UCC39413 |
UCC29411/2/3 |
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PARAMETER |
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TEST CONDITIONS |
MIN |
TYP |
MAX |
MIN |
TYP |
MAX |
UNITS |
Output Section |
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Quiescent Supply Current |
(Note 2) |
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15 |
28 |
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20 |
37 |
µA |
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Supply Current at Shutdown |
SD = GND |
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3 |
6 |
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5 |
10 |
µA |
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Regulation Voltage (UCC39412) |
1V |
< VIN < 3V |
3.2 |
3.3 |
3.39 |
3.15 |
3.3 |
3.45 |
V |
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1V |
< VIN < 3V, 0mA<IOUT<60mA |
3.17 |
3.3 |
3.43 |
3.11 |
3.3 |
3.5 |
V |
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(Note 1) |
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Regulation Voltage (UCC39413) |
1V |
< VIN < 5V |
4.85 |
5 |
5.15 |
4.78 |
5 |
5.23 |
V |
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1V |
< VIN < 5V, 0mA<IOUT<60mA |
4.8 |
5 |
5.2 |
4.71 |
5 |
5.3 |
V |
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(Note 1) |
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ADJ Voltage (UCC39411) |
1V |
< VIN < 3V |
1.212 |
1.25 |
1.288 |
1.194 |
1.25 |
1.306 |
V |
VGD Output Section |
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Quiescent Supply Current |
(Note 2) |
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20 |
40 |
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27 |
55 |
µA |
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Supply Current at Shutdown |
SD = GND |
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20 |
40 |
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27 |
55 |
µA |
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Regulation Voltage |
1V |
< VIN < 3V |
6.3 |
7 |
7.7 |
6.3 |
7 |
7.7 |
V |
(UCC39411/2) |
1V |
< VIN < 3V, 0mA<IOUT<10mA |
6.3 |
7 |
7.7 |
6.3 |
7 |
7.7 |
V |
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(Note 1) |
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Regulation Voltage (UCC39413) |
1V |
< VIN < 5V |
7.7 |
8.5 |
9.3 |
7.7 |
8.5 |
9.3 |
V |
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1V |
< VIN < 5V, 0mA<IOUT<10mA |
7.7 |
8.5 |
9.3 |
7.7 |
8.5 |
9.3 |
V |
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(Note 1) |
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Inductor Charging Section (L=22µH) |
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Peak Discontinuous Current |
Operating Range, L=22.1 H |
180 |
250 |
300 |
180 |
250 |
300 |
mA |
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Peak Continuous Current |
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385 |
550 |
715 |
385 |
550 |
715 |
mA |
Charge Switch RDSON |
D Package |
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0.5 |
0.75 |
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0.6 |
0.85 |
Ω |
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Current Limit Delay |
(Note 1) |
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50 |
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50 |
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ns |
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Synchronous Rectifier Section |
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Rectifier RDSON |
D Package |
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1.2 |
1.8 |
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1.4 |
2.16 |
Ω |
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Shutdown Section |
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Threshold |
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0.4 |
0.6 |
0.8 |
0.2 |
0.6 |
0.9 |
V |
Input Bias Current |
SD = GND |
2 |
5 |
15 |
2 |
5 |
15 |
µA |
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SD = 1.25V |
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5 |
20 |
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20 |
100 |
nA |
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Reset Section |
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Threshold (UCC39411) |
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1.08 |
1.125 |
1.17 |
1.07 |
1.125 |
1.18 |
V |
Threshold (UCC39412) |
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2.85 |
2.97 |
3.09 |
2.83 |
2.97 |
3.11 |
V |
Threshold (UCC39413) |
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4.32 |
4.5 |
4.68 |
4.3 |
4.5 |
4.7 |
V |
Reset Period |
CT = 0.15µF |
113 |
188 |
263 |
94 |
188 |
282 |
ms |
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VOUT to Reset Delay |
VOUT Falling at –1mV/µs (Note 1) |
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60 |
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60 |
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µs |
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Sink Current |
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1 |
20 |
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1 |
20 |
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mA |
Output Low Voltage |
IOUT = 500µA |
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0.1 |
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0.1 |
V |
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Output Leakage |
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0.5 |
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0.5 |
µA |
Note 1 : Guaranteed by design and alternate test methods. Not 100% tested in production.
Note 2: For the UCC39411 FB=1.306V, VGD=7.7V, For the UCC39412 VOUT=3.5V and VGD=7.7V, For the UCC39413 VOUT=5.3V, VGD=9.3V.
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