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SI9169_07 Datasheet, PDF (3/10 Pages) Vishay Siliconix – High Frequency 1-A Synchronous Buck/Boost Converter
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Si9169
Vishay Siliconix
SPECIFICATIONS
Parameter
SD, SYNC, PWM/PSM
Symbol
Test Conditions
Unless Otherwise Specified
2.7 V < VDD < 6 V,
VIN/OUT = 3.3 V, VS = 3.3 V
Mina
Logic High
VIH
Logic Low
VIL
Input Current
IL
Oscillator
2.4
- 1.0
Maximum Frequency
Accuracy
Maximum Duty Cycle
(Buck, Non LDO Mode)
Maximum Duty Cycle (Boost)
SYNC Range
SYNC Low Pulse Width
FMAX
DMAX
FSYNC/FOSC
2
Nominal 1.60 MHz, ROSC = 30 kΩ
- 20
Si9169BQ
75
FSW = 2 MHz
Si9169DQ
73
Si9169BQ
52
Si9169DQ
50
1.2
50
SYNC High Pulse Width
SYNC tr, tf
Error Amplifier
Input Bias Current
Open Loop Voltage Gain
FB Threshold
IBIAS
AVOL
VFB
VFB = 1.5 V
TA = 25 °C
50
-1
50
1.270
1.255
Unity Gain BW
BW
Output Current
Output Current
IEA
Source (VFB = 1.05 V), VCOMP = 0.75 V
Sink (VFB = 1.55 V), VCOMP = 0.75 V
1
Output Current
(PWM)
Boost Modec
Buck Moded
Output Current
(PSM)
Boost Modec
Buck Moded
rDS(on) N-Channel
rDS(on) P-Channel
Over Temperature Protection
IOUT
rDS(on)
VOUT ≤ 4.2 V
1.8 V ≤ VOUT ≤ 5.0 V
VIN = 3.3 V, VOUT = 3.6 V
VIN = 3.6 V, VOUT = 2.7 V
VS ≥ 3.3 V
1000
1000
150
150
Trip Point
Hysteresis
Rising Temperature
Supply
Normal Mode
VDD = 3.3 V, FOSC = 2 MHz
PSM Mode
IDD
VDD = 3.3 V
Shutdown Mode
VDD = 3.3 V, SD = 0 V
Notes:
a. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum.
b. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
c. VIN = VDD, VOUT = VIN/OUT = VS = VO, L = 1.5 µH, VIN ≤ VOUT
d. VIN = VDD = VS = VIN/OUT, VOUT = VO, L = 1.5 µH, VIN ≥ VOUT
e. Limits are for both Si9169BQ (- 25 °C to 85 °C) and Si9169DQ (- 40 °C to 85 °C) unless otherwise noted.
Limitse
Typb
85
85
65
65
60
1.30
1.30
2
-3
3
130
160
165
25
500
180
Maxa
0.8
1.0
20
1.5
50
1
1.330
1.340
-1
300
330
750
250
1
Unit
V
µA
MHz
%
ns
µA
dB
V
MHz
mA
mA
mΩ
°C
µA
Document Number: 70945
S-72058-Rev. E, 08-Oct-07
www.vishay.com
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