SI9169 Datasheet, PDF (3/8 Pages) Vishay Siliconix – High Frequency 1-A Synchronous Buck/Boost Converter

Si9169
Vishay Siliconix
SPECIFICATIONS
Parameter
Oscillator
Symbol
Test Conditions
Unless Otherwise Specified
2.7 V < V_DD < 6V,
V_IN/OUT = 3.3 V, V_S = 3.3 V
Min^a
Maximum Frequency
Accuracy
Max Duty Cycle (Buck, Non LDO Mode)
Max Duty Cycle (Boost)
SYNC Range
SYNC Low Pulse Width
SYNC High Pulse Width
SYNC t_r, t_f
Error Amplifier
F_MAX
D_MAX
F_SYNC/F_OSC
2
Nominal 1.60 MHz, R_OSC = 30 kW
−20
Si9169BQ
75
Fsw = 2 MHz
Si9169DQ
73
Si9169BQ
52
Si9169DQ
50
1.2
50
50
Input Bias Current
Open Loop Voltage Gain
FB Threshold
Unity Gain BW
Output Current
Output Current
Output Current (PWM)
Output Current (PSM)
Boost Mode^c
Buck Mode^d
Boost Mode^c
Buck Mode^d
r_DS(on) N-Channel
r_DS(on) P-Channel
Over Temperature Protection
I_BIAS
A_VOL
V_FB
BW
I_EA
I_OUT
r_DS(on)
V_FB = 1.5 V
T_A = 25_C
Source (V_FB = 1.05 V), V_COMP = 0.75 V
Sink (V_FB = 1.55 V), V_COMP = 0.75 V
V_OUT v 4.2 V
1.8 V v V_OUT v 5.0 V
V_IN = 3.3 V, V_OUT = 3.6 V
V_IN = 3.6 V, V_OUT = 2.7 V
V_S w 3.3 V
−1
50
1.270
1.255
1
1000
1000
150
150
Trip Point
Hysteresis
Supply Current
Rising Temperature
Normal Mode
PSM Mode
Shutdown Mode
V_DD = 3.3 V, F_OSC = 2 MHz
I_DD
V_DD = 3.3 V
V_DD = 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. V_IN = V_DD, V_OUT = V_IN/OUT = V_S = V_O, L = 1.5 mH, V_IN v V_OUT
d. V_IN = V_DD = V_S = V_IN/OUT, V_OUT = V_O, L = 1.5 mH, V_IN w V_OUT
e. Limits are for both Si9169BQ (−25_C to 85_C) and Si9169DQ (−40_C to 85_C) unless otherwise noted.
Limits^e
Typ^b
85
85
65
65
60
1.30
1.30
2
−3
3
130
160
165
25
500
180
Max^a
20
1.5
50
1
1.330
1.340
−1
300
330
750
250
1
Unit
MHz
%
ns
mA
dB
V
MHz
mA
mA
mW
°C
mA
Document Number: 70945
S-40695—Rev. D, 19-Apr-04
www.vishay.com
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