SI9169 Datasheet, PDF (2/8 Pages) Vishay Siliconix – High Frequency 1-A Synchronous Buck/Boost Converter

Si9169
Vishay Siliconix
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to GND
V_DD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5 V
MODE, PWM/PSM, SYNC, SD,
V_REF, R_OSC COMP, FB . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to V_DD +0.3 V
V_O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 V to V_S +0.3 V
PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "0.3 V
Voltages Referenced to PGND
V_S, V_IN/OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5 V
COIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.4 V to V_IN/OUT +0.4 V
Peak Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 A for 1 ms
Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4 A
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65 to 150_C
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150_C
Power Dissipation (Package)^a
20-Pin TSSOP (Q Suffix)^b . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0 W
Thermal Impedance (Θ_JA)
20-Pin TSSOP^c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90_C/W
Operating Temperature Range
Si9169BQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −25 to 85_C
Si9169DQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40 to 85_C
Notes
a. Device mounted with all leads soldered or welded to PC board.
b. Derate 11 mW/_C above 60_C.
c. With Pin 1 connected to GND plane.
Stresses beyond 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 beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
Voltages Referenced to GND
V_DD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7 V to 6 V
MODE, PWM/PSM, SYNC, SD . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V to V_DD
Voltages Referenced to PGND
V_S, V_IN/OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7 V to 6 V
F_osc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 kHz to 2 MHz
R_osc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 kW to 300 kW
V_REF Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.1 mF
SPECIFICATIONS
Parameter
Reference
Output Voltage
Load Regulation
Power Supply Rejection
UVLO
Under Voltage Lockout (turn-on)
Hysteresis
Soft-Start Time
SS time
MODE
Logic High
Logic Low
Input Current
SD, SYNC, PWM/PSM
Logic High
Logic Low
Input Current
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2
Symbol
V_REF
DV_REF
P_SRR
Test Conditions
Unless Otherwise Specified
2.7 V < V_DD < 6V,
V_IN/OUT = 3.3 V, V_S = 3.3 V
I_REF = 0
T_A = 25°C, I_REF = 0
V_DD = 3.3 V, −500 µA < I_REF <0
V_UVLOLH
V_HYS
V_UVLOLH − V_UVLOHL
tss
Limits^e
Min^a
Typ^b Max^a Unit
1.265
1.280
1.3
1.330
V
1.3
1.320
3
mV
60
dB
2.3
2.4
2.5
V
0.1
6
ms
V_IH
0.7 V_DD
V
V_IL
0.3 V_DD
I_L
−1.0
1.0
mA
V_IH
2.4
V
V_IL
0.8
I_L
−1.0
1.0
mA
Document Number: 70945
S-40695—Rev. D, 19-Apr-04